RIDGID 918 Roll Groover Manual

Safety Symbols

This operator's manual uses safety symbols and signal words to communicate important safety information. Understanding these is crucial for safe operation.

• Safety Alert Symbol ⚠️: Indicates potential personal injury hazards. Obey all safety messages following this symbol to avoid injury or death.
• DANGER ?: Indicates a hazardous situation which, if not avoided, will result in death or serious injury.
• WARNING ⚠️: Indicates a hazardous situation which, if not avoided, could result in death or serious injury.
• CAUTION ?: Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
• NOTICE ℹ️: Indicates information related to property protection.
• Read Manual Symbol: Means to read the operator's manual carefully before using the equipment for important safety and operation information.
• Eye Protection Symbol ?: Means always wear safety glasses with side shields or goggles to reduce the risk of eye injury.
• Minimum Pipe Length Symbol: Indicates the pipe to be grooved should be a minimum of 8" (200 mm) long to reduce the risk of injury.
• No Reaching Inside Pipe Symbol: Means do not reach inside the pipe being grooved to reduce the risk of entanglement, cutting, crushing, or other injuries.
• Machine Tipping Symbol: Indicates the risk of machine tipping, causing striking or crushing injuries.
• Foot Switch Symbol ?: Means always use a foot switch when using the machine to reduce the risk of injury.
• Crushing Hazard Symbol: Indicates the risk of fingers and hands being crushed between the groove rolls.

General Power Tool Safety Warnings

WARNING: Read all safety warnings, instructions, illustrations, and specifications. Failure to follow instructions may result in electric shock, fire, or serious injury. Save all warnings and instructions for future reference.

Work Area Safety

• Keep work area clean and well lit.
• Do not operate in explosive atmospheres (flammable liquids, gases, dust). Power tools create sparks.
• Keep children and bystanders away. Distractions can cause loss of control.

Personal Safety

• Stay alert, use common sense. Do not use while tired or under the influence of drugs, alcohol, or medication.
• Use personal protective equipment (PPE): always wear eye protection ?. Consider dust masks, non-skid shoes ?, hard hats, or hearing protection as appropriate.
• Prevent unintentional starting: Ensure the switch is OFF before connecting to power or battery.
• Remove adjusting keys or wrenches before turning the tool ON.
• Do not overreach; maintain proper footing and balance for better control.
• Dress properly: Do not wear loose clothing or jewelry. Keep hair and clothing away from moving parts.
• Do not let familiarity lead to complacency; a careless action can cause severe injury.

Power Tool Use and Care

• Do not force the tool; use the correct tool for the application.
• Do not use if the switch does not turn the tool ON and OFF.
• Disconnect power before making adjustments, changing accessories, or storing.
• Store idle tools out of reach of children and untrained users.
• Maintain tools and accessories: check for misalignment, binding, or breakage. Have damaged tools repaired before use.
• Use tools according to instructions, considering working conditions.
• Keep handles and grasping surfaces dry, clean, and free from oil/grease.

Service

• Have power tools serviced by a qualified repair person using identical replacement parts to maintain safety.

Specific Safety Information

WARNING: This section contains important safety information specific to the 918 Roll Groover. Read carefully to reduce the risk of electrical shock or other serious injury.

Roll Groover Safety

• Keep hands away from groove rolls. Do not wear loose-fitting gloves. Fingers can be crushed.
• Keep hands away from pipe ends. Do not reach inside pipe. Do not touch groove while operating. Burrs and sharp edges can cut.
• Keep guards in place. Do not operate without the guard; exposure to groove rolls can cause entanglement and serious injury.
• Only groove pipe 8" (200 mm) or longer. Grooving shorter pipe increases risk of entanglement and crushing injuries.
• Do not wear loose clothing. Keep sleeves and jackets buttoned. Do not reach across the machine or pipe.
• Use only with a power drive or threading machine that has a foot switch ?. Never block the foot switch ON. A foot switch provides better control. If entanglement occurs, power must be immediately cut off.
• Ensure the roll groover, pipe, stands, and machine are stable and properly set up and secured to prevent tipping. Properly support the pipe.
• Prepare and handle pipe properly; burrs and sharp edges can catch and cut.
• One person must control the work process, machine operation, and foot switch. Only the operator should be in the work area.
• Restrict access or barricade the area around the workpiece if it extends beyond the machine, providing a minimum 3' (1m) clearance to reduce entanglement risk.
• Use power drives and threading machines that operate under 58 rpm.
• Always wear appropriate PPE, including eye protection ? and possibly tight-fitting leather gloves ? and steel-toed footwear ?.
• Only use the roll groover for recommended pipe sizes and types.
• Before operating, read and understand this manual, the power drive/threading machine manual, fitting manufacturer's instructions, and any other equipment instructions.

RIDGID Contact Information

For questions about this RIDGID product:

• Contact your local RIDGID distributor.
• Visit RIDGID.com to find your local RIDGID contact point.
• Contact Ridge Tool Technical Service Department at rtctechservices@emerson.com, or in the U.S. and Canada call (800) 519-3456.

Description

The RIDGID® 918 Roll Groover is designed to form rolled grooves in steel, stainless steel, aluminum, PVC pipes, and copper tubes. Grooves are formed by hydraulically advancing the groove roll into the pipe, supported by the drive roll.

The 918 typically includes two groove and drive roll sets for grooving pipe:

• 2"-6" schedule 10 and 40 steel pipe
• 8"-12" schedule 10 and 8" Schedule 40 steel pipe

Other materials can be grooved (refer to appendix tables). Other groove and drive shaft sets are required for different sizes and copper tubing.

A two-stage hydraulic hand pump advances the groove roll. An adjustment nut controls groove diameter. An adjustable stabilizer aids in maintaining tracking and control, especially for pipe lengths approaching the 8" minimum.

The groover can be driven by various RIDGID machines; different mounting kits are required for each.

Key Components (Refer to Figure 1A): Guard, Hydraulic Pump, Pump Handle, Pump Release Lever, Warning Label, Mounting Base, Pipe Rotation Label, Crank Handle, Stabilizer, Stabilizer Wheel, Drive Shaft/Drive Roll.

Specifications

• Materials, Pipe: Steel, Stainless Steel, Aluminum, and PVC
• Capacity: Standard Groove Roll Sets: 2"-6" schedule 10 and 40 steel pipe. Optional Groove Roll sets: 8"-12" schedule 10 and 8" Schedule 40 steel pipe; 1-1/4" to 1-1/2" schedule 10 and 40 steel pipe; 2"-6" Copper Tube (Type K, L, M, & DWV). Refer to Tables I, II, and III for other materials and wall thicknesses.
• Depth Adjustment: Depth Adjustment Nut
• Actuation: 2 Stage Hydraulic Hand Pump
• Stabilizer: Manually adjusted, for 2 1/2" to 12" Pipe
• Mounting Bases Available: RIDGID 300 Power Drive, RIDGID 1224 Threading Machine, RIDGID 535A/M Threading Machine, RIDGID 300 Compact/1233 Threading Machine.
• Weight (918, 300 PD Base, Stabilizer): 82 lbs. (37 kg)
• Dimensions (918, 300 PD Base, Stabilizer) (WxDxH): 35" x 14" x 17.5" (889 mm x 356 mm x 445 mm)

Note: Do not use to groove 8" schedule 40 steel pipe harder than 150 BHN, as this may result in improperly formed grooves.

NOTICE: The 918 Roll Groover is designed for grooves within AWWA C606-15 specifications when used properly. Improper use can lead to out-of-specification grooves and equipment damage. Material selection and joining methods are the responsibility of the designer/installer. Evaluate the specific service environment (chemical, temperature) before installation. Contamination of stainless steel can cause corrosion; use dedicated roll sets or clean thoroughly between materials.

Standard Equipment

Refer to the RIDGID catalog for details on accessories supplied with specific machine catalog numbers.

Assembly

WARNING: To reduce the risk of serious injury during use, follow these procedures for proper assembly.

Assembling 918 to Bases for Various Machines

1. Mount the 918 on the appropriate machine base, aligning with 1/2" holes. For the 1224 base, install the spacer plate between the base and 918. Insert two 1/2" bolts from the underside of the base and tighten securely with a 3/4" wrench.
2. Mount the hydraulic pump on the base and secure with four 1/2" bolts, tightening with a 7/16" wrench. For the 1224 base, mount the pump bracket to the base and attach the pump to the bracket.
3. Mount the stabilizer on the base using two 3/8" screws, tightening with a 5/16" hex key.
4. For the 1233/300 Compact, loosely attach the rail clamp to the underside of the base.
5. Refer to figures for detailed assembly steps.

Figure 2 shows assembly to the 300 PD Base. Figure 5 illustrates assembly to the 1224 Base, including the spacer plate. Figure 3 shows assembly to the 300 Compact/1233 Base. Figure 4 shows assembly to the 535 Base.

Pre-Operation Inspection

WARNING: Do not use this roll groover with a power drive/threading machine that does not have a foot switch ?.

Before each use, inspect your roll groover and correct any problems to reduce the risk of serious injury and prevent damage.

1. If installed on a machine, ensure the machine switch is OFF and the unit is unplugged.
2. Clean any oil, grease, or dirt from the roll groover, including the pump handle and stabilizer crank handle, to aid inspection and prevent slipping.
3. Inspect the roll groover for:
   • Proper assembly, maintenance, and completeness.
   • Broken, worn, missing, misaligned, or binding parts.
   • Hydraulic leaks (oil on the groover may indicate a leak).
   • Presence and condition of the guard (See Figure 1). Do not operate without the guard.
   • Presence and readability of the warning label (see Figure 6).
   • Condition of the groove roll and drive roll. Clean drive roll knurls with a wire brush if dirty; dirty or worn knurls can cause pipe slippage and tracking issues.
   • Condition of the stabilizer wheel; replace if needed.
   • Any other condition that may prevent safe operation.
   • If any issues are found, do not use the roll groover until repaired.
4. Inspect and maintain any other equipment being used per its instructions. Confirm the Power Drive or Threading Machine has a functional foot switch ?.

Machine and Work Area Set-Up

WARNING: Set up the roll groover and work area according to these procedures to reduce the risk of injury from machine tipping, crushing, and other causes, and to prevent machine damage. Be aware of equipment weight; use appropriate lifting methods. Secure the roll groover to the power drive/threading machine and properly support the pipe to reduce the risk of falling pipe, tipping, and serious injury.

1. Locate a work area: Ensure adequate lighting and a clear, clean, level, stable, and dry place for all equipment and the operator. Clean up any oil.
2. Inspect pipe: Determine the correct tool for the job (see Specifications). Do not groove pipe with protrusions or outlets (like Tees or elbows), as this increases entanglement risk.
3. Confirm equipment: Ensure all equipment is properly inspected and assembled, and the correct grooving roll set is installed.
4. Set up Power Drive/Threading Machine: Position it on a flat, level area. Ensure the REV/O-OFF/FOR switch is in the OFF position. For 535A (Auto Chuck) machines, configure chuck jaws to grip pipe during REV rotation for stabilizer use (refer to the 535 Auto Chuck Manual).
5. Install 918 on Power Drive/Threading Machine: Follow specific setup instructions for the equipment. Confirm the setup is secure and stable.
6. Position foot switch ?: Ensure it is accessible for proper operation (as shown in Figure 18).
7. Connect power: With dry hands, plug the machine into an appropriate outlet.

Installing 918 On 300 Power Drive

1. Confirm 918 and base are properly assembled.
2. Remove any attachments from the 300 Power Drive support arms; ensure arms are fully extended and fixed.
3. Fully open the power drive's front chuck.
4. Slide the base opening (stabilizer side) over the rear support arm and lower the pump to the front support arm (Figure 7A).
5. Move the base toward the 300 Power Drive.
6. Center the drive shaft in the machine chuck, aligning its flats with the chuck jaws.
7. Securely tighten the front chuck on the drive shaft flats (Figure 7B).

Note: The 918 Roll Groover cannot be used with machines mounted on the 250 Folding Stand due to interference. It can be used with 100A/150A/200A stands with the appropriate base.

Installing 918 On 300 Compact/1233 Threading Machines

If 300 Compact or 1233 machines have straight pipe legs, they may not be stable enough for grooving. Use optional pipe legs with feet (Catalog # 56532) for improved stability (Figure 8A).

1. Confirm the 918 is properly assembled on the correct base for the machine. Securely attach the drive bar to the driveshaft.
2. Position the machine carriage towards the front chuck and swing any carriage-mounted tools away from the operator. Position the reamer inside the die head for safety.
3. Fully open the threading machine's front chuck. Insert the drive bar into the chuck, but do not secure yet.
4. Place the base's open slot (pump side) over the front carriage rail (Figure 8B) and lower the stabilizer to the rear carriage rail.
5. Place the drive bar over the drive shaft flats, aligning flats with set screws in the drive bar, and tighten securely.
6. With the 918 positioned at the end of the threading machine, securely tighten the machine's front chuck on the drive bar (Figure 8C).
7. Place the rail clamp under the rear carriage rail and secure (Figure 8D).

Installing On 535 and 1224 Threading Machines

Generally, the 918 can be installed on 535 and 1224 machines with the drive bar installed, or separately as with the 300 Compact/1233 machines.

For 535 Auto Chuck machines, set up so chuck jaws grip pipe during REV rotation (refer to the 535 Operator's Manual, Left Hand Threading section).

1. Confirm the 918 is properly assembled on the correct base. Securely attach the drive bar to the driveshaft.
2. Position the machine carriage towards the front chuck and swing tools away. Position the reamer inside the die head.
3. Fully open the threading machine's front chuck.
4. Insert the drive bar into the machine chuck. Place the base's open slot (stabilizer side) over the rear carriage rail and lower the pump to the front carriage rail (Figure 9).
5. With the 918 positioned at the end of the threading machine, securely tighten the machine's front chuck on the drive bar (Figure 10).

Operation

WARNING:

• Keep hands away from groove rolls. Do not wear loose gloves. Fingers can be crushed.
• Keep hands away from pipe ends. Do not reach inside pipe. Do not touch groove while operating. Burrs and sharp edges can cut.
• Keep guards in place. Do not operate without the guard.
• Only groove pipe 8" (200 mm) or longer.
• Use only with a power drive/threading machine with a foot switch ?. Never block the foot switch ON.
• Ensure the roll groover, pipe, stands, and machine are stable and properly set up. Support the pipe.
• Always wear eye protection ?. Wear steel-toed footwear ?.

Set up and operate the roll groover to reduce the risk of injury.

1. Confirm the machine and work area are properly set up and free of bystanders. The operator should be the only person in the area.
2. Position the foot switch ? for proper operation (Figure 18).
3. Check the roll groover for proper operation:
   • Move the power drive/threading machine switch to REV. Press and release the foot switch ?. The drive roll should rotate clockwise (Figure 14). If direction is incorrect or the foot switch does not control the machine, do not use until repaired.
   • Depress and hold the foot switch ?. Inspect moving parts for misalignment, binding, or unusual noises. Confirm machine speed is less than 58 rpm. Remove foot from the switch. If unusual conditions are found, do not use until repaired.
   • Move the REV/O-OFF/FOR switch to OFF. Unplug the machine with dry hands.

Pipe Preparation

NOTICE: Follow grooved coupling manufacturer's specific recommendations for pipe end preparation. Failure to do so may lead to leaks.

1. Be aware of pipe specifications for grooving. Out-of-specification pipe can cause leaks. Pipe out-of-roundness must not exceed tolerances in Table II.
2. Cut pipe to proper length. Minimum lengths:
   • 5" and smaller pipe: not shorter than 8" (200 mm).
   • 6" to 12" pipe: not shorter than 10" (250 mm).
   Grooving shorter pipe increases injury risk.
3. Ensure pipe end is cut square and free of burrs. Burrs can catch or cut. Cut-off method and large burrs affect groove quality. Do not groove pipe cut with a torch.
4. Remove all internal/external weld beads, flash, seams, scale, dirt, rust, and contaminants at least 2" back from the pipe end. Do not cut flats into gasket seat areas. Contaminants can clog drive knurls and affect driving/tracking.

Advance/Retract The Groove Roll

Movement is controlled by the hydraulic pump. To advance, move the pump lever to advance and pump the handle. To retract, move the lever to retract (Figure 11).

Loading Pipe in Roll Groover

1. Confirm machine switch is OFF.
2. Fully retract the groove roll.
3. Use appropriate pipe stands to support the pipe. Adjust stands so the pipe is level and the top inner diameter sits on the drive roll (Figure 12). Place stands directly in front of the groover. Stand placement depends on pipe length. For shorter pipe, one stand should be placed slightly more than half the pipe length from the groover. For longer pipes, use two stands placed approximately 1/4 of the pipe length from the ends. Proper support prevents tipping and aids tracking.
4. Place the pipe on the stand(s) with the end flush to the drive shaft flange and the inside contacting the top of the drive shaft (Figure 12). Ensure the pipe is stable and secure.
5. Advance the groove roll until it touches and lightly grips the pipe; do not indent or apply excessive pressure.
6. Confirm pipe positioning. If not positioned correctly, the groove may not track properly. The pipe end should be flush to the driveshaft flange. The pipe centerline and driveshaft centerline should be parallel (check with a level on the hydraulic cylinder and pipe, Figure 13). The roll groover/machine should sit firmly on the ground; adjust pipe stands if the machine lifts.
7. Preferred Operation (REV Setting): Slightly offset the pipe and stands approximately 1/2 degree (about 1" over at 10 feet) towards the operator. This aids tracking with the stabilizer (Figure 14).
8. Alternate Operation (FOR Setting): Offset the pipe and stands approximately 1/2 degree away from the operator (Figure 15). The stabilizer cannot be used in FOR setting, as it may cause pipe to spiral out.
9. Restrict access or set up guards/barriers to create a minimum 3' (1m) clearance around the equipment and pipe to prevent contact and reduce tipping/entanglement risk.
10. With dry hands, plug the power drive/threading machine into a properly grounded outlet.

Setting/Adjusting Groove Diameter

NOTICE: Perform a test groove before the first groove of the day or when changing pipe size, schedule, material, or lot to reduce the risk of out-of-tolerance grooves. Measure groove diameter to confirm proper size.

1. Confirm equipment setup and pipe preparation/loading are correct.
2. Groove roll should lightly grip the pipe. Advance the roll to just touch and lightly grip; do not indent or apply excessive pressure.
3. Rotate the depth adjustment nut until it stops against the main housing.
4. Back the depth adjustment nut off one turn (Figure 16).
5. Make a test groove.
6. Inspect/measure the test groove. If not in specification, reposition the depth adjustment nut:
   • To increase diameter (shallower groove), turn clockwise.
   • To decrease diameter (deeper groove), turn counter-clockwise.
   • Each 1/4 turn changes diameter approx. 0.025" (0.6 mm). One mark changes approx. 0.002" (0.05 mm).
7. Repeat steps 4-6 until the groove diameter is within specifications. If the groove is too large, it can be adjusted smaller. If too small, another groove must be made. Proper diameter is crucial for connection performance; out-of-spec grooves can cause joint failure.

Stabilizer Operation

The stabilizer applies slight force to 2 1/2" to 12" pipe to improve tracking, especially for short pieces. It also reduces swaying of longer, larger diameter pipe.

The stabilizer can only be used with the machine's REV/O-OFF/FOR switch in the REV position (Figure 17). Using it in the FOR position may cause pipe to spiral out.

1. Properly set up equipment and load pipe.
2. Set groove diameter.
3. Rotate the stabilizer crank handle to bring the roller into contact with the pipe. Rotate an additional 1 turn to preload the roller against the pipe (Figure 17). Do not reach across the pipe to adjust.
4. Groove pipe. Keep hands away from groove rolls, stabilizer wheel, and pipe ends. Do not groove pipe shorter than specified or reach inside pipe/touch groove.

If the pipe does not track properly, stop grooving. Set up a new groove and rotate the crank handle an additional 1/2 turn to increase preload. Do not use excessive preload, as it can damage the roller.

Once set, the stabilizer generally does not need readjustment for different pipe loads.

Grooving Operation

1. Confirm equipment setup and pipe preparation/loading are correct. Do not groove pipe shorter than 8".
2. Set groove diameter.
3. If needed, set the stabilizer position.
4. Assume a proper operating position for control (Figure 18). Stand facing the groover, with convenient access to controls. Keep hands clear of moving parts. Ensure good footing and balance.
5. Move the REV/O-OFF/FOR switch to REV.
6. Apply approx. a quarter stroke of the pump handle to force the groove roll into the pipe.
7. Depress the foot switch ?. The pipe will start to turn. Allow one full pipe rotation between quarter strokes of the pump handle. Do not advance the groove roll too aggressively, as this can cause spiraling or poor groove form. Keep hands clear of the groove set, pipe end, and stabilizer wheel. Do not reach inside the pipe or touch the groove.
8. Monitor the pipe. The end should stay in contact with the driveshaft flange, and the pipe should stay in position. If the pipe moves out of position, step off the foot switch ? and stop grooving. Keep body clear in case the pipe comes out of the grip. If the pipe end is damaged, a new groove must be prepared.
9. Continue applying a quarter stroke of the pump handle every pipe rotation. For the 1" roll set, avoid excessive force to prevent damage to the drive roll.
10. When the depth adjustment nut contacts the groover, allow the pipe to rotate two more full rotations for uniform groove depth.
11. Remove foot from the foot switch ?.
12. Move the REV/O-OFF/FOR switch to OFF.
13. Retract the groove roll and remove the pipe.
14. Inspect and measure the groove.

Tracking Tips

Pipe spiraling or walking off the drive shaft can occur. For good tracking:

• Follow all instructions.
• If tracking issues persist, slightly increase pipe offset (1/2 degree to 1 degree) (Figure 14).
• Tighten the stabilizer crank handle an additional 1/2 turn.
• Apply slight force to the pipe while grooving to maintain tracking, especially if the stabilizer is not used. Wear a leather glove ? and cup hand around the pipe (Figure 19). This may require securing the machine stand to the floor. Keep hands away from groove rolls and pipe ends.
• If the machine is run in FOR direction, the stabilizer cannot be used. Move stabilizer wheel away from pipe. If used in FOR, pipe may spiral out. If needed, push pipe slightly away with a gloved hand (Figure 20).

Inspect/Measure the Groove

1. Inspect the groove: Ensure all features are present and fully formed (Table II, Figure 30). Measure groove diameter to confirm it is within specification. Check other items required by the fitting manufacturer. Test the system per local codes. If problems are found, the groove cannot be used. Proper diameter ensures connection performance.
2. Measure groove diameter: Use a diameter tape (Optional Equipment Section). Wrap tape snugly around the pipe in the groove, ensuring it lies flat in the groove bottom. Read the diameter (Figure 21) and compare it to the required diameter in Table II or III, or as specified by the fitting manufacturer.

Preparing Machine for Transport

Before transporting, remove the 918 from the power drive/threading machine. Be aware of the equipment weight and use appropriate lifting methods.

Storage

WARNING: The 918 Roll Groover must be kept indoors or well covered. Store in a locked area out of reach of children and unfamiliar persons. This machine can cause serious injury in the hands of untrained users.

Maintenance Instructions

WARNING: Ensure the machine is unplugged from the power source before performing maintenance or adjustments.

Maintain the 918 Roll Groover according to these procedures to reduce injury risk.

Cleaning

• Use a soft damp cloth to clean the roll groover.
• Clean drive roll knurls with a wire brush before use and as necessary. When grooving stainless steel pipe, thoroughly clean the entire roll set with a stainless steel wire brush.

Lubrication

• Monthly (or more often if needed), lubricate the groover with a lithium-based general-purpose grease. Always lubricate after roll set changes.
• Lubricate at grease fittings (Figure 22). Add grease until a small amount pushes out.
• Apply light lubricating oil to pivot points and areas of relative motion, such as the depth adjustment nut and stabilizer feedscrew. Wipe excess lubricant.

Hydraulic Fluid Level

Remove the reservoir filler cap (Figure 23). The oil level should reach the fill line when the pump is resting on its base and the ram is fully retracted. Use only ISO 15 hydraulic oil.

Change hydraulic oil annually, or more often with heavy use or in dusty conditions. To drain, remove the filler cap and drain oil into a container. Dispose of used oil properly per the Safety Data Sheet (SDS) and local requirements.

The hydraulic system may need bleeding after fluid change. To bleed, position the ram lower than the pump by tipping the machine on its side. Extend and retract the cylinder piston several times to allow air to return to the reservoir.

Changing Roll Sets

NOTICE: When changing roll sets, ensure drive roll and groove roll markings match. Mismatched parts can cause improper grooves and leaks. Always change rolls as sets; do not mix rolls from different sets.

If installed, remove the roll groover from the power drive/threading machine and place on a stable workbench. Properly support rolls and shafts during replacement.

Changing Groove Roll

1. Fully retract the groove roll.
2. Fully retract the stabilizer wheel.
3. Loosen the groove roll set screw (Figure 24). Grasp the groove roll and remove the upper shaft and groove roll from the groover (Figure 25).
4. After changing drive shaft/drive roll, reverse steps to install. Ensure parts are clean to keep dirt out of bearings. Lubricate bearings before use.

Changing Drive Shaft/Drive Roll

The 918 has two drive shaft styles: a one-piece drive shaft (for 2"-6" and 8"-12" sizes) and a two-piece unit (drive shaft + interchangeable drive roll for 1", 1 1/4"-1 1/2", and 2"-6" Copper sizes) (Figure 26).

Changing Drive Shaft

1. Remove the groove roll.
2. Manually rotate the drive shaft while applying pressure to the spindle lock pin until it engages the spindle lock hole in the driveshaft.
3. With the spindle lock engaged, use a box wrench to remove the drive shaft bearing retaining nut (Figure 27).
4. Release pressure on the spindle lock pin to allow it to retract.
5. Remove the drive shaft from the front of the groover.
6. Reverse steps to install. Ensure parts are clean to keep dirt out of bearings. Lubricate bearings before use.

Changing Drive Roll (Two-Piece Drive Shafts)

1. With the spindle lock engaged, use a 15/16" hex in the box wrench to loosen the draw bolt.
2. Tap the draw bolt head with a soft face mallet to release the drive roll from the drive shaft.
3. Unthread the draw bolt from the drive roll and remove the drive roll from the front of the groover.
4. Reverse steps to install. Ensure the drive roll is fully seated in the drive shaft and the draw bolt is secure.

Changing One Piece Drive Shaft to Two Piece Drive Shaft

1. Remove the one-piece driveshaft.
2. Remove the rear bearing retaining plate screws and the plate (Figure 29).
3. Remove the rear bearing from the back of the 918 housing.
4. Install the two-piece drive shaft assembly into the back of the 918 housing. Ensure parts are clean to keep dirt out of bearings.
5. Reinstall the rear bearing retaining plate and screws.
6. Install the required drive roll. Lubricate bearings before use.

Tables

Table I, Pipe Wall Thickness

(Content for Table I would be transcribed here if available in the provided pages.)

Table II, Standard Roll Groove Specifications

(Content for Table II would be transcribed here if available in the provided pages.)

Table III, Copper Roll Groove Specifications

(Content for Table III would be transcribed here if available in the provided pages.)

Lifetime Warranty

Details for Lifetime Warranty are on the back cover.