Quill Installation - Komatsu 930E-2 Shop Manual

Cleaning and Inspection
NOTE: Use only fresh cleaning solvent, lint free wiping
cloth and dry filtered compressed air when cleaning
and handling hydraulic cylinder parts. Immediately
after cleaning and inspection, coat all surfaces and
parts with clean hydraulic oil (Type C-4).
1. Thoroughly clean and dry all parts.
2. Visually inspect all parts for damage or excessive
wear.
3. If cylinder bores or plated surfaces are exces-
sively worn of grooved, the parts must be re-
placed or, if possible, replated and machined to
original specifications.
4. The quill (2, Figure 8-21) should be checked for
tightness if it has not previously been tack
welded.
a. Check the quill for tightness by using special
tool SS1143 (Figure 8-21) and applying a tight-
ening torque of 1000 ft. lbs. (1356 N.m).
b. If the quill moves, remove quill, clean threads
in cover assembly and quill, and reinstall using
the procedure in "Quill Installation".
5. When a cylinder assembly is dismantled, the
capscrews (7, Figure 8-20) should be checked
carefully for distress and, if in doubt, replace
them.
L8-16
1. Cap Assembly
NOTE: SS1143 Tightening Tool can be made locally.
Request the following drawings from your Area or
Regional Service Manager:
SS1143 Tightening Tool - Assembly Drawing
SS1144 – Square Tube (3.50" x 3.50" x 0.19"
wall x 2.0" long)
SS1145 – Plate (2.50" x 2.50" x 0.25" thick)
SS1146 – Square Tube (3.00" x 3.00" x 0.25"
wall x 15.50" long)
SS1147 – Tube, Brass (1.75"O.D. x 1.50" I.D.
x 13.50" long)
SS1148 – Square Cut (2.50" x 2.50" x 0.75"
thick)
SS1149 – Hex Drive (1.75" Hex stock x 2.50"
long)
• All materials are 1020 Steel except SS1147.
Hoist Circuit Component Repair
FIGURE 8-21. QUILL INSTALLATION
2. Quill Assembly
L08024