Komatsu 830E-AC Shop Manual page 703

Installation
1. Lubricate splines of steering column shaft with
a molybdenum disulphide or multi-purpose
NLGI grease.
2. Move steering control unit into position and
align with steering column shaft splines. Secure
the steering control unit in place using four cap
screws, flatwashers and lockwashers.
3. Check for proper steering wheel rotation without
binding. Be certain wheel returns to neutral after
rotating 1/4 turn left and right. If necessary,
adjust steering unit and/or steering column to
realign column and control unit.
Serious personal injury to the operator or to any-
one positioned near the front wheels may occur if
a truck is operated with the hydraulic steering
lines improperly installed. Improperly installed
lines can result in uncontrolled steering and/or
SUDDEN AND RAPID rotation of the steering
wheel as soon as the steering wheel is moved. It
will turn rapidly and cannot be stopped manually.
After servicing the steering control unit, hydrau-
lic steering lines should be checked for correct
hook-up before starting the engine.
4. Tighten all cap screws to standard torque.
Unplug and attach hydraulic lines to their proper
ports. Refer to Figure 5-11 for port locations.
5. Start engine and check for proper steering func-
tion and any leaks.
6. Replace access cover and secure in place with
cap screws and lockwashers.
L05035
Disassembly
The steering control unit is a precision unit
manufactured
complete cleanliness is a must when handling the
valve assembly. Work in a clean area and use lint
free wiping materials or dry compressed air. Clean
type C-4 hydraulic oil should be used during
reassembly to insure initial lubrication.
1. Allow oil to drain from valve ports.
2. Match mark gear wheel set and end cover to
insure proper relocation during reassembly.
Refer to Figure 5-12.
3. Remove end cover cap screws and washers.
Remove cap screw with rolled pin (3, Figure
5-12). Mark hole location of cap screw with
rolled pin on end cover to facilitate reassembly.
FIGURE 5-12. DISASSEMBLY PREPARATION
1. Valve Assembly
2. Match Marks
Steering Component Repair
to close tolerances,
3. Cap Screw with Pin
4. End Cover
therefore
L5-19