Groundsmaster 4300--DHydraulic System Page 4 -- 74
Gear Pump Service
1. Front cover
2. Dowel pin (16 used)
3. Square section seal (8 used)
4. Back--up ring (8 used)
5. Pressure seal (8 used)
6. Thrust plate (8 used)
7. Drive shaft
8. Driven gear (2 used)
9. Body (P1 section)
10. Flange (3 used)
11. Splined connecting shaft (3 used)
12. Drive gear
13. Body (P2 section)
14. Drive gear
15. Driven gear
16. Body (P3 section)
17. Drive gear
18. Driven gear
19. Body (P4 section)
20. Rear cover
21. Washer (4 used)
22. Stud bolt (2 used)
23. Nut (2 used)
24. Cap screw (2 used)
Figure 72
4
1
2
9
10
11
8
5
6
7
12
3
6
8
13
14
17
18
15
16
19
20
21
22
23
24
21
33 ft--lb
(45 N--m)
33 ft--lb
(45 N--m)
Disassembly (Fig. 72)
NOTE: Thegearpumpmustbereplacedasacomplete
assembly. Individual gears, housings and thrust plates
are not available separately. Disassemble gear pump
for cleaning, inspection and seal replacement only.
IMPORTANT: Keep bodies, gears, flanges and
thrustplatesforeachpumpsectiontogether;donot
mix parts between pump sections.
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 a diagonal line across the
gear pump for assembly purposes (Fig. 73).
IMPORTANT: Use caution when clamping gear
pumpina visetoavoiddistortinganypumpc ompo-
nents.
3. Secure the front cover of the pump in avise with the
drive shaft pointing down.
4. Loosen the two (2) cap screws and two (2) nuts that
secures pump assembly.
5. Remove pump from vise and remove fasteners.
6. Supportthepumpassemblyandgentlytapthepump
case with a soft face hammer to loosen the pump sec-
tions. Be careful to not drop parts or disengage gear
mesh.
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