Variable Flow Pumps
Renewing Drive Shaft Seal
Note: The following procedure describes renewal of the
shaft seal. However this is not the normal sequence, the
sealing ring would normally be assembled with the taper
roller bearing from inside the pump to ensure a secure
sealing condition. If the shaft seal is to be renewed in this
manner, it is extremely important not to scratch or damage
the shaft, otherwise leakage will occur.
1 Remove retaining ring 1 and use a special rounded tool
such as a ground screwdriver to remove the drive shaft
sealing ring 2.
2 Examine the seal running area (driveshaft and housing)
for wear or damage. Damage in these areas will require
the pump to be further dismantled.
3 Lubricate the new seal with JCB Special MPL Moly
Grease.
4 Install the new seal, it is advisable to use a tube or
similar located over the driveshaft to ensure the seal
enters the housing evenly. DO NOT push the seal too
far into the housing. If the shaft seal touches the
bearing, the seal will be damaged.
5 Assemble the retaining ring 1.
22 - 7
Section E
Hydraulics
9803/3280
Section E
22 - 7
Issue 1
Service Procedures
1
2
S271880
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