Service Manual
HP2 Series Hydrostatic Tandem Pumps
4
Parker Hannifi n Corporation
Hydraulic Pump/Motor Division
Greeneville, Tennessee USA
HY13-1521-M1/US
General Information
WARNING
A warning describes hazards or unsafe practices
which could result in severe personal injury or death.
CAUTION
A caution describes hazards or unsafe practices which could
result in personal injury, product or property damage.
NOTE
A note gives key information to make following a procedure
easier or quicker.
Disclaimer
This Service Manual has been prepared by Parker Hannifi n Corporation for reference and use by mechanics who
have been trained to repair and service hydraulic pumps on commercial and non-commercial equipment appli-
cations. Parker Hannifi n Corporation has exercised reasonable care and diligence to present accurate, clear and
complete information and instructions regarding the techniques and tools required for maintaining, repairing and
servicing the Parker HP2 Series Hydrostatic Tandem Pump. Since this is a general Service Manual, the photo-
graphs and illustrations may not look exactly like the pump being serviced. The procedures, therefore, must be
carefully read and understood before servicing.
If inspection or testing reveals evidence of abnormal wear or damage to the HP2 Tandem Pump or if you en-
counter circumstances not covered in the Manual, STOP - CONSULT THE EQUIPMENT MANUFACTURER’S
SERVICE MANUAL AND WARRANTY. DO NOT TRY TO REPAIR OR SERVICE A HP2 TANDEM PUMP WHICH
HAS BEEN DAMAGED OR INCLUDES ANY PART THAT SHOWS EXCESSIVE WEAR UNLESS THE DAMAGED
AND WORN PARTS ARE REPLACED WITH ORIGINAL PARKER REPLACEMENT AND SERVICE PARTS AND
THE UNIT IS RESTORED TO PARKER SPECIFICATIONS FOR THE HP2 TANDEM PUMP.
It is the responsibility of the mechanic performing the maintenance, repairs or service on a particular HP2 Tan-
dem Pump to (a) inspect the unit for abnormal wear and damage, (b) choose a repair procedure which will not
endanger his/her safety, the safety of others, the equipment or the safe operation of the HP2 Tandem Pump, and
(c) fully inspect and test the HP2 Tandem Pump and the hydraulic system to ensure that the repair or service of
the HP2 Tandem Pump has been properly performed and that the HP2 Tandem Pump and hydraulic system will
function properly.
Conversions
INCHES
mm
INCHES
mm
.020
.511
1.060
26.92
.021
.531
1.295
32.89
.029
.741
1.297
32.94
.030
.760
1.396
35.46
.111
2.81
1.398
35.51
.119
3.02
1.620
41.15
.152
3.86
1.622
41.20
.160
4.06
1.983
50.37
.296
7.52
1.985
50.42
.304
7.72
2.120
53.85
.460
11.68
2.122
53.90
.470
11.94
2.233
56.72
.500
12.70
2.235
56.77
.585
14.86
2.483
63.07
.595
15.11
2.485
63.12
.660
16.76
2.500
63.5
.675
17.15
2.88
73.2
1.058
26.87
Defi nitions
4
