John Deere 803MH Harvester: Replacement Parts and Service Information
PIN: 1T0803MH___D270423—408745
Replacement Parts Guide
A detailed illustration shows the John Deere 803MH Harvester, a heavy-duty forestry machine. The machine is depicted in green and black, with a prominent red grapple attachment. Various components are numbered, corresponding to the parts listed below.
Primary Engine Air Filter Element
Part Number: AH148880
Interval: As Required
Description: Image of a cylindrical air filter element.
Secondary Engine Air Filter Element
Part Number: RE63932
Interval: As Required
Description: Image of a cylindrical air filter element.
Fuel Cap Breather Element
Part Number: T231314
Interval: 2000 hours
Description: Image of a small, cap-like breather element.
Hydraulic Oil Return Filter
Part Number: F061786
Interval: 2000 hours
Description: Image of a cylindrical filter.
Engine Rocker Arm Cover Gasket
Part Number: R527884
Interval: 2000 hours
Description: Image of a flat gasket.
Engine Oil Filter Element
Part Number: DZ118283
Interval: 500 hours
Description: Image of a cylindrical filter.
Hydrostatic Charge Oil Filter (IF EQUIPPED) (S.N. 328130--)
Part Number: AT490236
Interval: 2000 hours
Description: Image of a cylindrical filter.
Hydrostatic Pump Case Oil Filter (IF EQUIPPED)
Part Number: AT318160
Interval: 2000 hours
Description: Image of a cylindrical filter.
Cab Fresh Air Filter
Part Number: AT191102
Interval: 1000 hours
Description: Image of a rectangular filter.
Cab Recirculation Filter
Part Number: AT307501
Interval: 1000 hours
Description: Image of a rectangular filter.
Hydrostatic Charge Oil Filter Element (IF EQUIPPED) (S.N. --328129)
Part Number: AT412116
Interval: 2000 hours
Description: Image of a cylindrical filter.
Hydrostatic Charge Oil Filter Element (IF EQUIPPED) (S.N. 328130--)
Part Number: AT490237
Interval: 2000 hours
Description: Image of a cylindrical filter.
Hydraulic Oil Breather Filter
Part Number: F122930
Interval: 2000 hours
Description: Image of a cylindrical filter.
Primary and Final Fuel Filter Element (KIT)
Part Number: RE525523
Interval: 500 hours
Description: Image of two cylindrical filters.
Fuel Pre filter Element (IF EQUIPPED)
Part Number: R502778
Interval: 500 hours
Description: Image of a cylindrical filter.
Auxiliary Fuel Filter Element (IF EQUIPPED)
Part Number: AT365869
Interval: 500 hours
Description: Image of a cylindrical filter.
Oils and Capacities Information
Lubricants and Fluids
| Part Description | Part Number | Qty or Capacity | Change Interval in Hours |
|---|---|---|---|
| John Deere Plus-50™ II Engine Oil³ | TY26669 | 31.0 L (8.2 gal) | 500 |
| U6 Track Drive Planetary Oil (each)³ | TY26372 | 8.0 L (2.1 gal) | 1000 |
| U7 Track Drive Planetary Oil (each)³ | TY26372 | 9.0 L (2.4 gal) | 1000 |
| U7L Track Drive Planetary Oil (each)³ | TY26372 | 10 L (2.6 gal) | 1000 |
| API GL-5 Swing Drive Gear Case Oil (each)³ | TY26372 | 4.5 L (1.2 gal) | 1000 |
| John Deere Hy-Gard™ Pump Drive Gear Case Oil³ (if equipped) | TY6354 | 6.6 L (1.7 gal) | 1000 |
| John Deere Hydrau™ XR Hydraulic Enclosure Door Pump Oil³ | TY27318 | 4.1 L (1.1 gal) | 2000 |
| John Deere Hydrau™ Hydraulic Oil³ | TY27367 | 152.0 L (40.0 gal) | 2000 |
| John Deere Cool-Gard™ II Pre-Mix | TY26575 | 41.9 L (11.1 gal) | 6000 |
Fluid Analysis Test Kits
| Part Description | Part Number | Qty or Capacity | Change Interval in Hours |
|---|---|---|---|
| Engine Oil | AT346594 | 1 | 250 |
| Hydraulic Oil | AT346594 | 1 | 500 |
| Diesel Fuel | AT346594 | 2 | 500 |
| Pump Drive Gear Case Oil (if equipped) | AT346594 | 2 | 500 |
| Track Drive Planetary Oil | AT346594 | 1 | 500 |
| Swing Drive Gear Case Oil⁵ | AT346594 | 1 | 500 |
| Enclosure Door Pump Oil | AT346594 | 1 | 500 |
| Engine Coolant | TY27787 | 1 | 500 |
³See operator's manual for recommended oil type and oil viscosities based on operating temperatures.
⁴Based on fluid analysis results, intervals may need to be adjusted for your operating conditions. Consult your local John Deere dealer.
⁵Machines not equipped with high torque swing option only require one fluid analysis kit.
Plus-50 is a trademark of Deere & Company
Hydrau is a trademark of Deere & Company
Hy-Gard is a trademark of Deere & Company
Cool-Gard is a trademark of Deere & Company
Service Intervals
As Required
- Inspect serpentine belt
- Lubricate door hinges
- Lubricate toolbox door hinges (if equipped)
Every 10 Hours or Daily
- Check engine coolant level
- Inspect fire extinguisher
- Check and adjust track sag
- Lubricate boom joints and cylinder ends
- Lubricate swing drive pinion and bearing
- Lubricate crank and link (803M, 853M, and 859M only)
- Inspect chain shot guard (803MH, 853MH, and 859MH only)
- Check and drain primary fuel filter and water separator
- Check and drain final fuel filter
- Check and drain auxiliary fuel filter and water separator (if equipped)
Initial Service - 100 Hours
- Check track shoe cap screw torque
Every 100 Hours
- Lubricate swing drive gear case bearing
Initial Service - 250 Hours
- Drain and refill swing drive gear case oil
- Drain and refill pump drive gear case oil (if equipped)
- Drain and refill track drive planetary oil
- Check lower roller mounting cap screw torque
Every 250 Hours
- Check rear window alternative exit latches and retainer knobs
- Check track shoe cap screw torque
- Check skylight latch tension
- Take engine oil sample
- Check track drive planetary oil level
Every 500 Hours
- Replace fuel prefilter (if equipped)
- Take diesel fuel sample
- Replace primary fuel filter and water separator
- Take hydraulic oil sample
- Replace final fuel filter
- Take engine coolant sample
- Replace auxiliary fuel filter and water separator (if equipped)
- Take pump drive gear case oil sample (if equipped)
- Drain and refill engine oil and replace filter
- Take track drive planetary oil sample
- Check battery electrolyte level and terminals
- Take swing drive gear case oil sample
- Check enclosure door pump oil level
- Take enclosure door pump oil sample
- Drain water and sediment from fuel tank
- Check air intake hoses
Every 1000 Hours
- Drain and refill swing drive gear case oil
- Drain and refill track drive planetary oil
- Check coolant condition
- Drain and refill pump drive gear case oil (if equipped)
- Check cab fresh air and cab recirculation filters
Every 2000 Hours
- Drain and refill hydraulic oil
- Replace hydraulic oil return filters
- Replace hydraulic oil breather filter
- Replace hydrostatic charge oil filter (if equipped)
- Drain and refill engine coolant
- Drain and refill enclosure door pump oil
- Replace fuel cap breather element
- Check and adjust engine valve lash
Every 6000 Hours
- Drain and refill engine coolant
Release Date: June 2022
Manufactured by John Deere.
