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Removal
WARNING
Read Injection Hazard, page 3; Burn Hazard, page 4
1.
Relieve pressure; page 5.
2.
Remove bearing housing. Refer to Bearing Housing and
Connecting Rod, Removal, page 8.
CAUTION
Premium models: Gallon counter sensor is connected to con-
trol board in pressure control. Pulling on the sensor wires could
cause damage.
3.
Premium sprayers: Remove two screws (108) and gallon
counter sensor (39).
CAUTION
Thrust washers may stick to grease inside of drive housing.
Do not lose or misplace.
4.
Remove six screws (38).
5.
Lightly tap around drive housing (33) to loosen drive
housing. Pull drive housing straight off pinion housing. Be
prepared to support combination gear (32) which may
also come out.
Installation
1.
F
. 2. Apply all grease supplied with replacement gear
IG
cluster to gear teeth and to areas called out by note 3.
2.
F
. 3. Ensure thrust washers (30, 31; 5900/7900) (30, 31,
IG
72; 3900) are on combination gear (32) and washers (Fig.
2; 33a, 33b) are on crankshaft of drive housing (33) as
shown.
3.
Clean mating surfaces of pinion and drive housings.
4.
Align gears and push new drive housing straight onto
pinion housing (29) and locating pins (B).
5.
Install six screws (38).
6.
Install gallon counter sensor (39) with two screws (108).
7.
Install bearing housing. Refer to Bearing Housing and
Connecting Rod, Installation, page 8.
310893J
Drive Housing
DO NOT use drive housing screws (38) to align or seat
drive housing with pinion housing. Align these parts with
locating pins, to avoid premature bearing wear.
8.
Install screws (38) in drive housing. Torque evenly to note
3 value in F
9.
Install pump. Refer to Displacement Pump, Installation,
page14.
F
. 2
IG
F
. 3
IG
CAUTION
. 2.
IG
GMax II 3900: Torque to 140 ±10 in-lb (15.8 ±1.1N.m)
GMax II 5900: Torque to 200 ±10 in-lb (22.6 ±1.1 N.m)
GMax II 7900: Torque to 200 ±10 in-lb (22.6 ±1.1 N.m)
Gallon counter sensor
Pack with grease 114819
Drive Housing
Copper
Steel
9
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