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Instruction Manual for Danfoss models including: 33 Hydrostatic Transmission, 33, Hydrostatic Transmission, Transmission
File Info : application/pdf, 9 Pages, 1.21MB
DocumentDocumentDanfoss Hydraulics Division R epair Information Danfoss Hydrostatic Transmission Charge Pumps for Models 33 thru 76 AX436478029428en-000101 Gasket Low pressure relief cartridge O-Ring CW Dowel Key CCW Pump End Cover O-Ring Shaft (Tang Drive) CCW Dowel O-ring Body Bead Location Spacer Bead Gerotor O-ring Cover 2 Shaft Seal Shaft B - Pad Press Seal .334 to .344 Recessed from Surface X A - Pad Press Seal .110 to .130 Recessed from Surface Y Retaining Ring Cover Figure 1 Shaft Seal Disassembly Reassembly 1 Remove the low pressure relief valve cartridge. 1 Install the hollow dowels in the body. Remove the o-rings from the valve and discard. 2 Lubricate and install the new o-rings in the Further disassembly of the relief valve is not usually spacer. necessary and is not recommended. 3 Install the spacer per the desired rotation. Refer to figure 1. For counterclockwise (CCW) rotation, Maximum Pressure Setting identifications: align the beads on the spacer and body. For The charge pressure relief valves are factory clockwise (CW) rotation, do no align the beads on preset. The pressure code us stamped on the the spacer and body. hex plug located on the end of the valve 4 Install the gerotor into the spacer. cartridge. to determine the pressure setting, add Note: On the A and B Pad charge pumps, retaining a zero to the right of the stamped number. rings hold the inner gerotor star to the shaft. System Pressure Examples 5 Install the key in the keyway, aligning the key 022 = 220 PSI Setting [15 Bar] with the rounded notch in the gerotor star. 034 = 340 PSI Setting [23 Bar] 6 Install the shaft in the gerotor. 7 If the shaft seal was removed, install the new 2 Loosen all cap screws. seal in the cover counterbore with the lip of the seal 3 Remove only the four corner cap screws. facing inward. On the A Pad charge pump, press 4 Remove the entire charge pump assembly from the seal into the counterbore until it is recessed the pump end cover. Remove the gasket and two .110 to .130 inch [2,7 to 3,3 mm] from the Y surface dowels from the body if they did not remain in the end (see illustration). On the B Pad charge pump, the cover. seal must be recessed .334 to .344 inch 8,5 to 8,7 5 To disassembly the charge pump assembly, mm] from the X surface. remove the two remaining cap screws. 8 Install the cover. The larger kidney cast in the 6 Remove the cover. The A and B Pad charge cover must face the inlet. To prevent misassembly, pumps have a seal in the cover. If you are repairing the bolt holes in the cover, spacer section and body the charge pump, remove the shaft seal from the are not symmetrical. cover. If you are only changing the rotation, there is 9 Install the two cap screws that retain the charge usually no need to remove the seal. pump assembly. Torque them to 16 lb-ft [22 N·m]. 3 7 Remove the shaft and key. On the A and B Pad 10 Install the gasket and solid dowels in the end charge pumps, retaining rings hold the inner gerotor cover, if they were removed. star to the shaft. 11 Install the charge pump on the main pump, 8 Remove the gerotor. aligning the charge pressure drain port and also 9 Remove the spacer. aligning the tank on the charge pump shaft with the 10 Remove the o-rings from the spacer and slot in the main pump shaft. discard them. Note: Pad B charge pumps use a splined drive 11 Remove the two hollow dowels from the spacer. rather than a tang drive. 12 Install the four corner cap screws and torque to 16 lb-ft [22 N·m]. CW Disassembly of Parts U V W X Y Z Not Required CCW U V Dual Element Charge Pump Body Bead Location Retaining Ring Spacer Bead W XYZ Gerotor Port Plate 103457 Four (4) Bolts Mark Pump Gears for Reassembly Before Complete Disassembly 4 One (1) Bolt Figure 2 Port Plate 103458 Four (4) Bolts One (1) Bolt Center Section C B D A D Marks B Do Not Rotate End For End Marks C Bush Pack Bush Lobe Seal A Backing Ring End Cap 103161 5 End Cap 103161 Short Bolt Location 6 Disassembly - Dual Element Charge Pump 1 Remove the four mounting bolts that run through the standard charge pump (front section) and the rear pump (rear section). 2 Remove the single bolt holding the rear pump to the standard charge pump. Remove the rear pump. 3 Remove the three end cover bolts. 4 Remove the end cover. 5 Remove the o-ring, backing ring and bush lobe seals. 6 Mark the bush packs and gears for correct reassembly. The same bush packs must remain with the same gears because of the wear pattern. Remove the bush packs. 7 Remove the center section from the port plate. 8 Remove the hollow dowels from the center section. 9 Remove the o-ring, backing rings and bush lobe seal from the other side of the center section. 10 Remove the bush packs and driven and drive gears from the center section. The drive gear has a splined shaft. Reassembly 1 Reassembly the charge pump, aligning the charge pump spacer for the desired rotation. Note: Instructional information Form No. 2-600 describes rotation change procedure. 2 Install the hollow dowels in the center section of the rear pump. Make sure this side of the center section faces the port plate. 3 Install the bush packs in the center section. The same bush packs must stay with the same gears because of the wear pattern. The bush pack opening must face the outlet side of the center section. 4 Install the bush lobe seals, backing ring and o-ring on the side of the center section facing the port plate. 7 5 Install the driven and drive gears. 6 Install the last two bush packs. Once again, the bush pack opening must face the outlet side of the center section. 7 Install bush lobe seals, backing ring and o-ring. 8 Install the end cover. 9 install the three end cover bolts. 10 Install the rear pump on the charge pump. Install the bolt that holds the rear pump to the charge pump. Tighten it 22 to 24 lb-ft [2,5 to 2,7 N·m] for dry threads and 20 to 22 lb-ft [2,3 to 2,5 N·m] for lubricated threads. 11 Install the four mounting bolts that run through the charge pump and rear pump. tighten them 22 to 23 lb-ft [2,5 to 2,7 N·m] for dry threads and 20 to 22 lb-ft [2,3 to 2,5 N·m] for lubricated threads. · Cartridge valves · DCV directional control valves · Electric converters · Electric machines · Electric motors · Gear motors · Gear pumps · Hydraulic integrated circuits (HICs) · Hydrostatic motors · Hydrostatic pumps · Orbital motors · PLUS+1® controllers · PLUS+1® displays · PLUS+1® joysticks and pedals · PLUS+1® operator interfaces · PLUS+1® sensors · PLUS+1® software · PLUS+1® software services, support and training · Position controls and sensors · PVG proportional valves · Steering components and systems · Telematics Danfoss Power Solutions is a global manufacturer and supplier of high-quality hydraulic and electric components. We specialize in providing state-of-the-art technology and solutions marine sector. Building on our extensive applications expertise, we work closely with you to ensure exceptional performance for a broad range of applications. We help you and other customers around the world speed up system development, reduce costs and bring vehicles and vessels to market faster. Danfoss Power Solutions your strongest partner in mobile hydraulics and mobile Go to www.danfoss.com for further product information. outstanding performance. And with an extensive network of Global Service Partners, we also provide you with comprehensive global service for all of our components. Local address: Hydro-Gear www.hydro-gear.com Daikin-Sauer-Danfoss www.daikin-sauer-danfoss.com Danfoss Power Solutions (US) Company 2800 East 13th Street Ames, IA 50010, USA Phone: +1 515 239 6000 Danfoss Power Solutions GmbH & Co. OHG Krokamp 35 D-24539 Neumünster, Germany Phone: +49 4321 871 0 Danfoss Power Solutions ApS Nordborgvej 81 DK-6430 Nordborg, Denmark Phone: +45 7488 2222 Danfoss Power Solutions Trading (Shanghai) Co., Ltd. Building #22, No. 1000 Jin Hai Rd Jin Qiao, Pudong New District Shanghai, China 201206 Phone: +86 21 2080 6201 Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products agreed. All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved. © Danfoss | December 2022