Terex TS14G, Maintenance Manual

Page: 193 / 376

Section 220-0090
SM 1765 2-99
7
INSTALLATION
Note:
Tighten all fasteners to standard torques listed
in Section 300-0080, STANDARD BOLT AND NUT
TORQUE SPECIFICATIONS.
Note:
Tighten all hydraulic lines fitted with ORFS
connections, as described in Section 220-0000,
STEERING SYSTEM SCHEMATIC.
1. Make certain, area of installation is clean. Position
steering valve onto mounting bracket on frame and
secure in place with mounting hardware as removed at
Removal. Tighten bolts equally so that the valve body
is not distorted.
2. Remove blanking caps from hydraulic lines and
install lines to steering valve as identified during
removal.
3. Attach the end rod and link bar to the steering valve
spool. Refer to Section 220-0180, STEERING GEAR
AND LINKAGE, for attachment of link bar.
4. Check oil level in the hydraulic tank and add oil if
required. Refer to Section 235-0040, HYDRAULIC
TANK for correct fill level, and, Section 300-0020,
LUBRICATION SYSTEM for oil specification.
5. Place the battery master switch in the 'On' position,
start the engine and bring hydraulic oil to operating
temperature.
6. Turn steering wheel lock to lock several times and
check steering valve and hydraulic line connections for
leaks and tighten as required.
7. Stop the engine and turn the steering wheel several
times to bleed oil pressure. Check the hydraulic oil
tank level. Replenish if required.
8. Remove wheel blocks.
ADJUSTING RELIEF VALVE
Numbers in parentheses refer to Figures 2 and 8.
Remove plug from gauge port of steering valve and fit
a 0 - 207 bar (0 - 3 000 lbf/in
2 ) pressure gauge.
Start engine and allow hydraulic oil to warm up to
normal operating temperature. Steer the machine a full
90
° and lock brakes. With steering cylinder at end of
stroke, keep steering wheel turned. This will keep
steering valve control spool in an operating position
and allow pressure to build up.
With machine operating at 1 500 rpm, the relief valve
should open at 134 bar (1 950 lbf/in
2 ).
If pressure is above or below recommended pressure
setting, adjust the relief valve as follows:
1. Remove nut (20) and washer (22).
2. Loosen jam nut (21).
3. Turn adjusting screw (23) in to increase pressure or
out to decrease pressure.
4. Tighten jam nut (21) after completing adjustments.
5. Reinstall washer (22) and nut (20). Torque tighten
nut to 50 Nm (35 lbf ft), lubricated.
6. Shut off engine and release oil pressure in the
system by turning the steering wheel back and forth.
Remove pressure gauge and reinstall plug in steering
valve.
SPECIAL TOOLS
There are no special tools required for procedures
outlined in this section. Refer to Section 300-0070,
SERVICE TOOLS, for part numbers of general service
tools required. These tools are available from your
dealer.
SPECIAL TORQUE SPECIFICATIONS
TORQUE
FIG NO ITEM NO DESCRIPTION Nm lbf ft
1 & 2 20 Nut 50 35
1 & 2 38 Nut 70 - 80 50 - 60
1 53 Capscrew 40 - 50 30 - 40
* * * *
Steering System - Steering Valve
Courtesy of Machine.Market