Gear Pump Service - Toro Greensmaster TriFlex 3320/3420 Service Manual

Gear Pump Service

15
16
1
1. O- -ring
2. Front cover
3. Back- -up seal
4. Pressure seal
5. Front thrust plate
6. Drive shaft
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 when clamping gear
pump in a vise to avoid distorting any 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.
Hydraulic System
5
2
4
3
7. Idler gear
8. Rear thrust plate
9. Dowel pin (4 used)
10. O- -ring
11. Housing
10
8
6
4
7
Figure 35
Page 5 - - 52
12
9
11
9
3
12. End cover
13. Cap screw (4 used)
14. Washer (4 used)
15. Shaft seal
16. Retaining ring
MARKER LINE
Figure 36
Greensmaster 3320/3420
14 13
33 ft- -lb
(45 N- -m)