Pressure Control Assembly Replacement
22
312361D
Pressure Control Assembly Replacement
See Wiring Diagram, page 27.
Removal
1.
Relieve pressure, page 7. Disconnect power cord
from outlet.
2.
Hi-Boy Models Only - Disconnect high-pressure
hose at pump outlet (see page 13).
3.
Remove two screws (4) and shroud (12) (see illus-
tration, page 17).
4.
Disconnect pressure switch connector (A) from con-
trol board (18).
5.
Remove tape (3) holding wires to manifold.
6.
Pull wires back through hole (K) in housing.
7.
Turn the pressure control knob (17) counter clock-
wise as far as you can to access the flats on either
side of the pressure control assembly.
8.
Using a 1 in. (26 mm) wrench loosen and unscrew
pressure control assembly.
9.
Remove pressure control assembly.
Installation
1.
Align pressure control cap (21) on fluid manifold so
opening faces toward motor.
2.
Apply Loctite
®
to threads on pressure control
assembly (17)
3.
Screw pressure control assembly (17) into manifold
and torque to 150 in-lbs (17.0 N•m).
4.
Route wires around knob and feed through slot in
bushing (23).
5.
Insert bushing (23) in hole (K) in housing. Secure
wires to manifold housing with tape (3).
6.
Reconnect pressure switch connector (A) to control
board (18).
7.
Install shroud (12) and two screws (4) (see illustra-
tion, page 17).
8.
Hi-Boy Models Only - Reconnect high-pressure
hose at pump outlet (see page 14).
17
21
A
K
ti9129a
3
23
ti9128a
If you plan to reuse the pressure control assembly,
be very careful not to damage or tangle the wires
while unscrewing the assembly.
Inspect pressure control assembly before installa-
tion to verify the o-ring is installed and in place.
Be careful when tightening pressure control knob
that wires do not get pinched between the pressure
control assembly and fluid manifold.
