Change Hydraulic Oil

1. Park machine on level surface. Lower blade to ground.

  • On single function grapple machine, close tongs and lower grapple head to ground with arch.
  • On dual function grapple machine, close tongs, fully extend boom cylinders, and lower grapple head to ground with arch.

2. Stop engine.

3. Remove hydraulic reservoir filler cap.

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4. Lower engine frame bottom guard (A).


A-Engine Frame Bottom Guard

T130036B

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NOTE: On machines 540G-III and 548G-III, the approximate capacity of hydraulic reservoir is 30.3 L (8 gal). On machines 640G-III, 648G-III and 748G-III, the approximate capacity of hydraulic reservoir is 41.6 L (11 gal).

5. Route drain hose (B) outside of engine frame.

6. Remove plug (C) from drain hose. Loosen hose clamp as necessary.


B-Drain Hose
C-Plug

T130155B

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7. Open drain valve (D) with a 1/4 in. hex key and drain oil into container. Dispose of waste properly.

8. Close drain valve and install drain plug. Route drain hose inside engine frame after use. Install engine frame bottom guard.


D-Drain Valve

T130156B

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9. Replace hydraulic oil filter (E). (See Replace Hydraulic Filter in Maintenance-Every 500 Hours.)


E-Hydraulic Oil Filter

T130042C

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10. Add oil at fill cap (F). (See Fuels and Lubricants chapter.)

Specification

Hydraulic Reservoir Oil-540G-III, 548G-III -Capacity 30.3 L (8 gal) Approximate
Hydraulic Reservoir Oil-640G-III, 648G-III, 748G-III -Capacity 41.6 L (11 gal) Approximate


F-Fill Cap

T130043C

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11. Oil level must be seen in sight tube (G). Use blue scale (H) when machine hydraulic oil is not at operating temperature. Use red scale (I) when machine hydraulic oil is at operating temperature.

12. Start engine. Check for leaks around the filter base. Tighten filter only enough to stop leaks.

13. Stop engine. Check oil level.

14. Start engine and run for two minutes to refill filter.

15. Stop engine. Check oil level.


G-Sight Tube
H-Blue (Cold Oil) Scale
I-Red (Warm Oil) Scale

T130004D
T130301

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