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Parker Hannifin Corporation | Pump & Motor Division | Kings Mountain, NC Parker Hannifin Corporation | Pump & Motor Division | Kings Mountain, NC
WARNING: This product can expose you to chemicals including lead or DEHP which are known to the state of California to cause cancer,
birth defects, and other reproductive harm. www.p65warnings.ca.gov
WARNING: This product can expose you to chemicals including lead or DEHP which are known to the state of California to cause cancer,
birth defects, and other reproductive harm. www.p65warnings.ca.gov
Catalog HY13-PMD500-SM/US
PGP/PGM 500 Series
Gear Pumps & Motors Service Manual
Disassembly Instructions
1) Place the pump in a vise with the drive shaft pointing
down (Fig. 1). Match-mark all sections. Be sure to align
these marks when reassembling.
DO NOT GRIP ON OR NEAR ANY MACHINED
SURFACES DURING ASSEMBLY OR DISASSEMBLY.
Start Disassembly
CAUTION:
1. If prying off sections becomes necessary, take extreme care not to mar or damage machined surfaces. Excessive force
while prying can result in misalignment and seriously damage parts.
2. If parts are difcult to t during assembly, tap gently with a soft hammer. (Never use an iron hammer.)
3. Handle with care to avoid damage to the journals or teeth. Avoid touching gear journals.
2) Remove four bolts and cap screws on single units
or the 4 hex nuts, studs and washers of multiple
units (Fig. 2). Use an impact driver in a cross-
pattern. Inspect threads and cap screws for wear.
3) Lift off the port end cover and look at underside
for any damage (Fig. 3). If prying is necessary, be
careful not to damage the machined surfaces.
Figure 1
Figure 2
Figure 3
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