Roper G12-436 - Manual (Page 7)

2. INSTRUCTIONS FOR PUMP DISASSEMBLY
Refer to PUMP SECTIONAL DRAWINGS, (Figures 7.1 and 7.2)
1. Read WARNINGS before starting to disassemble pump. While disassembling pump, always inspect
disassembled parts and adjacent parts to see if further disassembly is needed. Replace worn or damaged parts
as required.
2. If you do not know which pump arrangement you have, collect nameplate data and refer to the Owners Manual for
3611-22 (G12-209), to determine what you have. Consult a Roper distributor or Roper Pump Company if you
have any questions.
3. When cleaning or lubricating, use only cleaning solutions and lubricants that are compatible with products being
pumped and with sealing elastomers. DO NOT use petroleum base products with seals with EPR elastomers.
Use a nonpetroleum base lubricant with EPR elastomers.
4. Turn off pump and lock out energy source to driver. DO NOT proceed further with disassembly of pump if there is
the slightest possibility that driver may be started.
5. If used, turn off and disconnect flush from mechanical seal.
6. Close inlet and discharge valves.
7. Remove guard and disconnect coupling between driver and pump.
8. Drain inlet and discharge lines. Disconnect lines from pump inlet and discharge.
9. Follow the procedure in the Owners Manual for 3611-22 (G12-209), INSTRUCTIONS FOR DRAINING PUMP.
10. A.) For 3600/4600 “GHBO” pumps, follow steps 11 – 20.
B.) For 3600/4600 “BHB” pumps, go to Section 4, INSTRUCTIONS FOR DISASSEMBLY OF A TYPE “BHB”
HYDRAULIC DRIVE. After disassembling hydraulic drive, return to this section and follow steps 11 – 20.
C.) For 3600/4600 “GHB” pumps, follow steps 21 – 32.
D.) For 3700/4700 “GHBO” pumps, follow steps 11 – 20.
E.) For 3700/4700 “BHB” pumps, go to Section 4, INSTRUCTIONS FOR DISASSEMBLY OF A TYPE “BHB”
HYDRAULIC DRIVE. After disassembling hydraulic drive, return to this section and follow steps 11 – 20.
F.) For 3700/4700 “GHB” pumps, follow steps 42 – 53.
11. Remove two washer head cap screws (K) and eight hex head cap screws (L) securing faceplate (23A, B, C) to
case (19A, B, C, D). Remove faceplate (23A, B, C).
12. Remove two dowel pins (J) from case.
13. Remove case gaskets (20).
14. On “BHB” and “GHBO” pumps, remove drive gear (34) and key (B) from drive shaft (32).
15. Remove idler gear (35) and key (B) from idler shaft (33). Remove idler shaft.
16. Remove two washer head cap screws (K) and eight hex head cap screws (L) securing backplate (6A, B) to case
(19A, B, C, D). Separate parts.
17. Remove case gaskets (20) from opposite side of case (19A, B, C, D).
18. Remove two dowel pins (J) from opposite side of case (19A, B, C, D).
19. Remove drive key (A) from drive shaft (32).
20. A.) For 3600/4600 “GHB” gear reduction unit, follow steps 21 – 32.
B.) For 3600/4600 “GHBO” and “BHB” pumps, follow steps 33 – 41.
C.) For 3700/4700 “GHB” gear reduction unit, follow steps 42 – 53.
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