Lull 6K Service Manual - Manual (Page 159)

Supply, Pressure, and Return Hydraulics
Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K 5-15
14. Remove the fuel tank drain plug. Clean the inside of the fuel tank with
high-pressure jet spray of diesel fuel to ensure it is free of rust, sludge,
scale, metallic particles, deposits, and other residue. Drain into suitable
container and hand wipe clean with dry rags.
15. Perform steps 6 through 9 under “Reservoir Drain and Refill” on
page 5-11.
16. Install the fuel tank drain plug (Item 18). Tighten two or three turns past
finger tight. If it is necessary to use thread sealant to stop fluid leakage,
make sure that the sealant is applied only to the last few threads close
to the drain plug head.
CAUTION: To avoid contamination of the fuel system, do not apply thread
sealant to the end threads of the drain plug.
Installation
Hydraulic Reservoir and
Fuel Tank (Ref. Fig. 5-9) The following procedure describes installation of the
hydraulic reservoir/fuel tank.
1. Inspect the two (2) pieces of chemprene belting (Item 2) and replace if
necessary.
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.
2. While ensuring that the hydraulic reservoir/fuel tank is properly
supported and in the proper position, attach the two (2) tank hold-down
straps (Item 1) over the two pieces of chemprene belting and to the
tank support mount (Item 22) using four (4) each nuts (Item 24) and
lockwashers (Item 23). For final tightening, torque nuts to 35 ft-lbs.
3. Reconnect the suction tube elbow (Item 21) to the JIC pipe connector
(Item 20).
4. Reconnect swivel nut of swivel branch tee (Item 13) to check valve
(Item 14). For final tightening, torque to 44–48 ft-lbs.
5. Reconnect return manifold tube (Item 10) to JIC pipe connector
(Item 9) on hydraulic oil return filter (Item 11). For final tightening,
torque connector on return manifold tube to 188–213 ft-lbs.
6. Reconnect fuel lines (Items 17 and 5) to elbow (Item 15) and pipe
adapter (Item 3). Secure the fuel lines to the fittings with hose clamps
(Items 4 and 16) and tighten as necessary.
7. Install wiring harness (Item 8) on fuel sender with two (2) flatwashers
(Item 6) and nuts (Item 7). Tighten nuts until snug.
8. Fill hydraulic reservoir according to the preferred method on page 5-8.
9. Fill fuel tank as outlined in Section 3.