25
Disassembly
Parts Inspection
16
. Remove the piston OD seal (235) from the
piston sleeve (03) using a seal tool or a utility
knife.
17
. Remove the piston ID bearing (342) from the
piston sleeve (03) using a seal tool.
18
. Remove the piston ID seal (234) from the piston
sleeve (03) using a seal tool.
1.
Prior to inspection, clean all parts in a wash tank
and dry with compressed air.
2. Housing
— Inspect the cylinder bore for wear
and scratches. Local polishing can repair minor
scratches and damage. Inspect all bearing and
seal surfaces for signs of wear or damage.
Check the condition of the gear teeth for any
signs of extreme wear or chipping. Inspect the
housing for signs of damage or cracking.
3. Shaft
— Check the shaft surface for scratches
from the piston seal or other damages. Small
or minor scratches can be carefully polished.
Examine the condition of the gear teeth.
4. Drive Hubs
— Inspect the ID and OD splines
for signs of chipping or serious wear. Evaluate
the surface finish of the seal grooves.
5. Lock Nuts
— Inspect the threads for galling or
cross threading. Make sure that the end cap
spins freely on the threads of the shaft. Evaluate
the surface finish of the seal grooves.
6. Piston Sleeve
— Inspect the condition of the
gear teeth. Evaluate the surface finish of the
seal grooves.
7. Seals
— Helac recommends replacement of all
seals and bearings.
DISASSEMBLY
03
03
03
235
342
234
