Lull 6K Service Manual - Manual (Page 158)

Supply, Pressure, and Return Hydraulics
5-14 Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
(Ref. Fig. 5-9) The following procedure describes removal of the hydraulic
reservoir/fuel tank.
1. Follow preparation procedures as outlined in Section 3 of this manual.
Be sure to follow the guidelines in this section detailed under “General
Hydraulic Maintenance Practices” on page 5-4.
2. Remove the hydraulic reservoir drain plug (Item 19) and drain hydraulic
fluid into a suitable container. Dispose of drained fluid properly.
Temporarily reinstall drain plug.
3. Remove fuel tank drain plug (Item 18) and drain the fuel into an
suitable container. Dispose of drained fuel properly. Temporarily
reinstall drain plug.
WARNING: Fuel is highly combustible. Avoid all possibilities of sparks that
could ignite the fuel. Drain the fuel tank in a well ventilated
area, away from smoking materials, open flames, or exposed
heater parts.
4. Remove two (2) nuts (Item 7) and flatwashers (Item 6) securing wiring
harness (Item 8) to fuel sender.
5. Loosen and disconnect swivel nut of swivel branch tee (Item 13) from
check valve (Item 14).
6. Tag fuel lines (Items 17 and 5). Remove hose clamps (Items 4 and 16)
on fuel lines. Cap elbow (Item 15) and pipe adapter (Item 3).
7. For models with control manifold hydraulics, disconnect the suction
tube elbow (Item 21) from the JIC pipe connector (Item 20).
8. For models with mid-inlet hydraulics, remove the four (4) capscrews
(Item 26) and lockwashers (Item 27) securing the two (2) flange halves
(Item 29) and the hydraulic suction hose (Item 30) to the hydraulic
strainer (Item 28). Remove the flange halves.
9. Loosen and remove the return manifold tube (Item 10) connected to
the JIC pipe connector (Item 9) on the hydraulic oil return filter
(Item 11).
CAUTION: To avoid personal injury and/or damage to the equipment,
support the hydraulic tank to ensure that it does not twist or
fall when removing or installing it.
10. After ensuring that the tank is properly supported, remove the four (4)
each nuts (Item 24) and lockwashers (Item 23) that secure the two (2)
tank hold-down straps (Item 1) to the tank support mount (Item 22).
11. Remove the hydraulic reservoir/fuel tank (Item 12) to an appropriate
area for cleaning/inspection.
12. Inspect reservoir/fuel tank for damage and replace if necessary.
13. Remove hydraulic reservoir drain plug and perform steps 3 thru 5
under “Reservoir Drain and Refill” on page 5-11.