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Greensmaster 3320/3420Hydraulic System Page 5 -- 52
Gear Pump Service
1. O--ring
2. Front cover
3. Back--up seal
4. Pressure seal
5. Front thrust plate
6. Drive shaft
7. Idler gear
8. Rear thrust plate
9. Dowel pin (4 used)
10. O--ring
11. Housing
12. End cover
13. Cap screw (4 used)
14. W asher (4 used)
15. Shaft seal
16. Retaining ring
Figure 35
2
3
6
8
9
10
11
1
5
7
15
12
4
13
14
33 ft--lb
(45 N--m)
4
3
9
16
Gear Pump Disassembly (Fig. 35)
NOTE: Disassemble gear pump for cleaning, inspec-
tion and seal replacement only. Individual gears, hous-
ings and thrust plates are not available separately. If
internal components are worn or damaged, the gear
pump must be replaced as a complete assembly.
1. Plug pump ports and thoroughly clean exterior of
pump with cleaning solvent. Make sure work area is
clean.
2. Use a marker to make diagonal line across the front
cover, housing and end cover for assembly purposes
(Fig. 36).
IMPORTANT: Use caution w hen clamping gear
pump ina vise toavoid distortinga ny pump compo-
nents. Also, use a vise with soft jaws.
3. Secure the front cover of the pump in a vise with soft
jaws with the drive shaft pointing down.
Figure 36
MARKER LINE