Stiga 13-7454-11, Workshop Manual

Page: 37 / 123

3.1.2 Installing the power steering
servo
Install the power steering servo in re-
verse order. Check that the hydraulic
hoses were correctly installed according
to the markings made during removal.
The system will be automatically bled af-
ter several steering wheel movements,
carry out a few turns of the steering wheel
before driving.
Check after installation that no oil leak-
age has occurred.
3.1.3 Replacing O rings in the
power steering servo
Remove the power steering servo as
follows
Place the unit vertically with shaft C posi-
tioned upwards.
1. Over pressure valve R: Remove the
plastic plug from the adjustment
screw and unscrew it using a 6 mm Al-
len key.
Remove the spring and valve spool
from the housing (A).
2. Choke valves S: Remove the plastic
plugs from the adjustment screws and
unscrew using a 6 mm Allen key.
Shake out the two springs and two
valve balls. Unscrew the valve seats
with a 3 mm Allen key.
Place the unit vertically with shaft C
positioned downwards.
Before removing make a marking on
the housing at port P.
3. Unscrew the screws Q (5x), using a
16mm spanner.
4. Remove the cover P, spacer O, gear
wheel N, plate M, O-rings 5 (3x) and
propshaft L.
5. Shake out the non-return valve ball J,
ball stop I, emergency control ball G,
ball stop E (2x), and intake valve balls
D (2x).
6. Slide the whole spool out of housing
A.
7. Press pin K out of the spool.
8. Carefully press shaft C out of sleeve F.
9. Press out neutral position springs H
from shaft C.
10. Shake bearing B from housing A.
11.Remove dust seal 6 and shaft seal 7
using a screw driver.
WORKSHOP MANUAL
TITAN
Chapter
3 - Steering system
EDITION
2018
Page
3 5