Lull 1044C-54 Series II Service Manual - Manual (Page 100)

Supply, Pressure, and Return Hydraulics
5-18 31200079
6. Remove the sight gauge (Item 1) along with the two (2) hollow hex
head bolts (Item 2).
7. Clean the two openings in the side of the hydraulic reservoir with
appropriate solvent. Plug openings.
Installation
Sight Gauge (Ref. Fig. 5-10) The following procedures describes installation of the
reservoir sight gauge.
1. Remove the four (4) O-rings (Item 3) from the sight gauge and clean
O-rings with appropriate solvent. Dry with compressed air. Check for
and replace any damaged O-rings.
2. Inspect sight gauge for damage and replace if necessary. Clean sight
gauge with appropriate solvent and dry with compressed air.
3. Install four (4) O-rings (Item 3) in sight gauge. Lubricate each O-ring
before installing it.
4. Clean the two (2) hollow hex head bolts (Item 2) with appropriate
solvent; inspect and replace if damaged.
5. Install sight gauge (Item 1) on hydraulic reservoir (Item 9) with hollow
hex head bolts (Item 2) and nuts (Item 10). Tighten as necessary.
6. Install hydraulic oil return filter assembly (Item 6) as per instructions on
page 5-26.
7. Reconnect return manifold tube (Item 8) to the JIC pipe connector
(Item 7) on the hydraulic oil return filter assembly (Item 6). For final
tightening, torque hex head connector on return manifold tube to
188–213 ft-lbs.
8. lean the inside of the reservoir of rust, sludge, scale, metallic particles,
deposits, and other residue with high pressure jet spray of diesel fuel.
Drain into suitable container and hand wipe clean with dry rags.
Dispose of contaminated diesel fuel properly.
9. Install the reservoir drain plug (Item 4). Tighten two or three turns past
finger tight. If it is necessary to use thread sealant to stop fluid leakage,
apply sealant only to the last few threads close to the drain plug head.
CAUTION: To avoid contamination of the hydraulic system, do not apply
thread sealant to the end threads of the drain plug.
10. Fill hydraulic reservoir. (See page 5-8.)