Graco GMax
3900 - Page 18

308868 9
Pinion Assembly/Rotor/Field/Shaft/Clutch
Removal
If pinion assembly (19) is not removed from clutch
housing (5), do 1. through 4. Otherwise, start at 5.
1.
Relieve pressure; page 4.
2. Disconnect field cable (X) from pressure control.
8699A
Fig. 5
X
Bottom View
3. Fig. 6. Remove five screws (10) and lockwashers
(17) and pinion assembly (19).
10
17
10
17
Fig. 6
8700A
19
4. Fig. 7. Place pinion assembly (19) on bench with
rotor side up.
5. Remove four screws (72) and lockwashers (17).
Install two screws in threaded holes (E) in rotor.
Alternately tighten screws until rotor comes off.
Fig. 7
E
72
17
8701A
6. Fig. 8. Remove retaining ring (Z).
7. Tap pinion shaft (A) out with plastic mallet.
Fig. 8
Z
A
8703A
8. Fig.9. Use an impact wrench or wedge something
between armature (4a) and clutch housing to hold
engine shaft during removal.
9. Remove four screws (16) and lockwashers (17).
10. Remove armature (4a).
Fig. 9
16
17
4a
8704A