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Maintenance Section
cooling system coolant is drained to a level that is
below the water temperature regulator housing.
Illustration 225 g00975677
1. Loosen hose clamp (1).
2. Remove hose (2) from the housing.
3. Loosen hose clamp (3).
4. Remove hose (4) from the fitting.
5. Remove bolts and washers (5).
6. Remove water temperature regulator housing (6).
Remove the water temperature regulator and the
gasket.
NOTICE
If the water temperature regulator is installed
incorrectly, it will cause the engine to overheat.
7. Install a new water temperature regulator and a new
gasket.
8. Install water temperature regulator housing (6).
9. Install washers and bolts (5). Tighten the bolts.
10. Install hose (4). Tighten hose clamp (3).
11. Install hose (2). Tighten hose clamp (1).
12. Refill the cooling system. Refer to Operation and
Maintenance Manual, "Capacities (Refill)" and
the appropriate Service Manual.
Differential Oil - Change
NOTICE
Care must be taken to ensure that fluids are contained
during performance of inspection, maintenance, testing,
adjusting and repair of the product. Be prepared to collect
the fluid with suitable containers before opening any
compartment or disassembling any component
containing fluids.
Refer to Special Publication, NENG2500, "Caterpillar
Dealer Service Tool Catalog" for tools and supplies
suitable to collect and contain fluids on Caterpillar
products.
Dispose of all fluids according to local regulations and
mandates.
Park the machine on level ground. Fully retract the
boom and fully lower the boom. Move the transmission
control to the NEUTRAL position and engage the
parking brake. Shut off the engine.
Rear Axle Differential
Illustration 226 g00952999
1. Clean the area around the plugs. Remove the
following plugs for the rear differential:
• Drain plug (1)
• Combined level plug and filler plug (2)
Allow the oil to drain into a suitable container.
2. Clean drain plug (1) and reinstall drain plug (1).
3. Add new oil to the differential housing through filler
hole (2) until the oil is level with the threads for plug
(2). Refer to Operator and Maintenance Manual,
"Lubricant Viscosities" for the correct grade of oil.
Refer to Operation and Maintenance Manual,
"Capacities (Refill)" and the appropriate Service
Manual for more detailed lubricant information.
4. Clean combined level plug and filler plug (2).
Reinstall combined level plug and filler plug (2).