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Drive Housing
16 3A0243A
Drive Housing
Removal
1. Relieve pressure; page 4.
2. Remove bearing housing. Refer to Bearing Hous-
ing and Connecting Rod, Removal, page 15.
3. Premium sprayers: Remove two screws (108) and
gallon counter sensor (39).
4. Remove six screws (38).
5. Lightly tap around drive housing (33) to loosen drive
housing. Pull drive housing straight off pinion hous-
ing. Be prepared to support combination gear (32)
which may also come out.
Installation
1. Apply all grease supplied with replacement gear
cluster to gear teeth and to areas called out by note
3.
2. Ensure thrust washers (30, 31; 5900/7900) (30, 31,
72; 3900) are on combination gear (32) and wash-
ers (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 15.
8. Install screws (38) in drive housing. Torque evenly to
note 3 value below.
9. Install pump. Refer to Displacement Pump,
Installation, page 14.
NOTICE
Premium models: Gallon counter sensor is connected to
control board in pressure control. Pulling on the sensor
wires could cause damage.
NOTICE
Thrust washers may stick to grease inside of drive
housing. Do not lose or misplace.
NOTICE
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.
"
"
TIA
B
A
3
2
1
1
GMAX II 3900: Torque to 140 ±10 in-lb (15.8 ±1.1 N•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)
Texspray 5900HD: Torque to 200 ±10 in-lb (22.6 ±1.1 N
•m)
Texspray 7900HD: Torque to 200 ±10 in-lb (22.6 ±1.1 N
•m)
Gallon counter sensor
Pack with grease 114819
TIA
1
2
Copper
Steel