H1 & HMMWV Maintenance & Repair
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| 3850 lb Uses Red O-Ring, RCSK17877 3400 lb Uses Black O-Ring, 12342633 | |
| The 3850 pound wheel can be identified by the extra unused hole in the outer bolt ring. | |
For questions about your H1 or HMMV e-Mail [email protected]
Suggested H1 & HMMWV Maintenance Schedules
| Vehicle | Service Interval |
|---|---|
| H1 up to 1997 | 3,000 • 6,000 • 12,000 • 15,000 • 30,000 • 57,000 • 60,000 Miles |
| H1 1997 and After | 3,000 • 6,000 • 12,000 • 15,000 • 24,000 • 36,000 • 60,000 Miles |
| General Maintenance | Group A • Group B • Group C |
H1, up to 1997
| 3,000 Miles (4,800 km) | |
|---|---|
| 9,000 • 15,000 • 21,000 • 27,000 • 33,000 • 39,000 • 45,000 • 51,000 • 57,000 • 63,000 | |
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Change engine oil and replace filter. |
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Check alignment and toe-in, toe-out. |
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Check items in Maintenance Group A. |
| Back to Top | |
| 6,000 Miles(9,600 km) | |
|---|---|
| 18,000 • 30,000 • 42,000 • 54,000 • 66,000 • 78,000 • 90,000 • 102,000 • 114,000 Miles | |
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Change engine oil and replace filter. |
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Clean or replace air filter. |
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Replace fuel filter element. |
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Check items in Maintenance Groups A & B |
| Back to Top | |
| 12,000 Miles (19,000 km) | |
|---|---|
| 24,000 • 36,000 • 48,000 • 60,000 • 72,000 • 84,000 • 96,000 • 108,000 • 120,000 Miles | |
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Change engine oil and replace filter. |
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Clean or replace air filter. |
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Replace fuel filter element. |
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Change engine coolant. |
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Change transmission fluid and transfer case fluid. |
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Check alignment and toe-in, toe-out. |
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Check items in Maintenance Groups A, B & C. |
| Back to Top | |
| 15,000 Miles (24,000 km) | |
|---|---|
| 21,000 • 27,000 • 33,000 • 39,000 • 45,000 • 57,000 • 63,000 • 69,000 • 75,000 • 81,000 Miles | |
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Change engine oil and replace filter. |
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Check items in Maintenance Group A. |
| Back to Top | |
| 30,000 Miles (48,000 km) | |
|---|---|
| 96,000 Miles | |
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Change engine oil and replace filter. |
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Clean or replace air filter. |
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Replace fuel filter element. |
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Check alignment |
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Check items in Maintenance Groups A & B. |
| Back to Top | |
| 57,000 Miles (91,700 km) | |
|---|---|
| 63,000 • 69,000 • 75,000 • 81,000 • 87,000 • 93,000 • 99,000 • 105,000 • 111,000 • 117,000 Miles | |
|
Change engine oil and replace filter. |
|
Check items in Maintenance Group A. |
| Back to Top | |
| 60,000 Miles (65,500 km) | |
|---|---|
| 24,000 • 36,000 • 48,000 • 60,000 • 72,000 • 84,000 • 96,000 • 108,000 • 120,000 Miles | |
|
Change engine oil and replace filter. |
|
Clean or replace air filter. |
|
Replace fuel filter element. |
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Change engine coolant. |
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Change transmission fluid and transfer case fluid. |
|
Check alignment and toe-in, toe-out. |
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Check items in Maintenance Groups A, B & C. |
| Back to Top | |
H1, 1997 and Up
| 3,000 Miles (4,800 km) | |
|---|---|
| 9,000 • 15,000 • 21,000 • 27,000 • 33,000 • 39,000 • 45,000 • 51,000 • 57,000 • 63,000 Miles | |
|
Change engine oil and replace filter. |
|
Check items in Maintenance Group A. |
| Back to Top | |
| 6,000 Miles (9,600 km) | |
|---|---|
| 18,000 • 30,000 • 42,000 • 54,000 • 66,000 • 78,000 • 90,000 • 102,000 • 114,000 Miles | |
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Change engine oil and replace filter. |
|
Clean or replace air filter. |
|
Replace fuel filter element. |
|
Check items in Maintenance Groups A & B |
| Back to Top | |
| 12,000 Miles (19,000 km) | |
|---|---|
| 72,000 Miles | |
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Change engine oil and replace filter. |
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Clean or replace air filter. |
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Replace fuel filter element. |
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Change geared hub oil. |
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Change axle oil. |
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Change engine coolant. |
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Change transmission fluid and transfer case fluid. |
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Change transmission filter. |
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Check items in Maintenance Groups A, B & C. |
| Back to Top | |
| 15,000 Miles (24,000 km) | |
|---|---|
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Change engine oil and replace filter. |
|
Check items in Maintenance Group A. |
| Back to Top | |
| 24,000 Miles (38,6000 km) | |
|---|---|
|
|
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Change engine oil and replace filter. |
|
Clean or replace air filter. |
|
Replace fuel filter element. |
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Change engine coolant. |
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Change transmission fluid and transfer case fluid. |
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Change transmission filter. |
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Check items in Maintenance Groups A & B |
| Back to Top | |
| 36,000 Miles (58,0000 km) | |
|---|---|
| 96,000 Miles | |
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Change engine oil and replace filter. |
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Clean or replace air filter. |
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Replace fuel filter element. |
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Change engine coolant. |
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Change transmission fluid and transfer case fluid. |
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Change transmission filter. |
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Change geared hub oil. |
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Change axle oil. |
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Check items in Maintenance Groups A & B |
| Back to Top | |
| 60,000 Miles (65,500 km) | |
|---|---|
| 120,000 Miles | |
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Change engine oil and replace filter. |
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Clean or replace air filter. |
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Replace fuel filter element. |
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Change engine coolant. |
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Change transmission fluid and transfer case fluid. |
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Change transmission filter. |
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Inspect fuel tank, fuel cap and fuel lines. |
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Change geared hub oil. |
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Change axle oil. |
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Drain and replace brake fluid. |
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Check items in Maintenance Groups A, B & C. |
| Back to Top | |
General Maintenance Groups
| Group A (approx. 1.0 hours of labor) | |
|---|---|
| Check items in Maintenance Group A | |
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Check fluid levels and condition of power steering, pump, cooling system, (reservoir tank), brakes, transmission, transfer case, geared hubs and axels. |
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Check CDR valve for oil separation. |
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Inspect condition of control arms, springs, and shock absorbers. |
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Check tire wear and condition. |
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Inspect geared hubs for leaking seals or damage. |
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Inspect service brakes and parking brake. |
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Check axels for leaks or damage. |
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Check wheel bolt and nut torque. |
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Inspect condition of transmission and transfer case vent lines. |
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Inspect U-joints for wear or missing / damaged grease fittings. |
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Inspect transmissions / transfer case shift linkage for wear, binding, loose, excessive play. |
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On non-turbo models. Inspect accelerator linkage for wear binding, distortion. |
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Inspect condition of engine mounts and insulators. |
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Check fuel filter and drain / clean if necessary. |
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Check CTIS operation. Verify that system inflates / deflates tires and has no leaks. |
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Check winch condition. Payout and pay-in at least 30′ of cable. |
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Inspect ball joints for wear. |
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Check air cleaner. |
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Test drive vehicle and complete a function check of all systems. |
| Back to Top | |
| Group B (approx. 5.6 hours of labor) | |
|---|---|
| Check items in Maintenance Group B | |
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Inspect fuel injection pump, lines and fittings for leaks or damage. |
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Check battery voltage and condition. Clean battery exterior with ammonia / water or baking soda mixture. |
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Inspect serpentine belt condition. |
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Inspect exhaust system and shields. |
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Inspect and rotate tires. |
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Inspect half-shaft boots and ball joint seals. |
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Inspect condition of steering column, u-joints, tie-rods, steering arm, center link, and idler arm. |
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Check fuel tank line filter. |
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Inspect condition of frame rails and cross-members. |
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Check A/C system operation. |
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Check wheel alignment. |
| Back to Top | |
| Group C (approx. 8.0 hours of labor) | |
|---|---|
| Check items in Maintenance Group A | |
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Inspect surge tank, radiator and shroud, A/C condenser. |
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Power steering and transmission coolers and all hoses and fittings for security of mounting, leaks, or damage. |
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Inspect fuel tank, lines and cap. |
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Inspect all wiring harnesses for frays, splits, missing insulation, poor connections. |
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Inspect power steering pump, power steering gear, hoses, lines and fittings for leaks or damage. |
| Back to Top | |