Service Manual

Minor Repair
General
Minor repairs may be performed, following the proce-
dures in this section, without voiding the unit warranty.
Cleanliness is a primary means of assuring satisfactory
lie on either new or repaired units. Cleaning
parts by
using a clean solvent wash and air drying
is usually
adequate.
As with any precision equipment, all parts
must be kept free of foreign materials and chemicals.
Protect all exposed sealing surfaces and open cavities
from damage and foreign material.
It is recommended that all O-rings be replaced. Lightly
lubricate all O-rings with clean petroleum jelly prior
to
assembly.
I
Fitting/Plug Torques
If any plugs are removed from the housing or end cap
during servicing, they should be torqued as indicated in
the accompanying tables:
r Item I Torque I
Case Drain Fitting
(9/16-18 0-Ring)
I 15-20 ft. Ibs.
System
Ports
(3/4-16 O-Ring)
1 15-20 ft. Ibs.
Inlet Fitting/Plug
(7/16-20 0-Ring)
I 8-10 ft. Ibs.
Check Valve Plugs
(9/16- 18 0-Ring)
I 15-20 ft. Ibs
-
-
Input Shaft Seal Removal
Bypass Valve I 7-10 ft. lbs
input Shaft Seal Retaining Ring Removal
Input Shaft Seal, Spacer Washer, and Retaining Ring Removed
Shaft Seals
Lip type seals are used on the input shaft and displace-
ment control shaft of the BDP-1 0L variable pumps. These
seals can be replaced without major disassembly of the
unit. However, replacement of these seals generally
requires removal of the pump from the machine.
To replace the pump input shaft seal, first remove the
retaining ring from the housing.
Carefully pull the
seal out of the housing bore. A “hook”
type tool may be used to grasp the seal and pull
it out, or
a slide hammer type puller may be used to re-move the
seal. Care must be taken so as not to damage the housing
bore, shaft sealing surface, or bearing. Once removed,
the seal
is not reusable.
Page 6 BDP Service Manual