Section E - Hydraulics
Rams
Typical Ram
E-149 E-149
9803-9340-8
JCB Ram Sealing Procedure
TE-005
1 Fit new rod seals.
Use seal fitting tool 4-A to fit rod seals, the size
(diameter) and position of pins 4-B is determined by
the diameter and radial width of the rod seal being
fitted.
Fig 4. Seal Fitting Tool
The pins are screwed into threaded holes in the tool
body, the spacing of the holes is designed to suit
small or large diameter rod seals.
a Open the tool and insert the new rod seal 5-A. The
seal must be fitted behind the two front pins but in
front of the rear pin as shown.
Fig 5.
Note: Later ram end caps and piston heads are metric
threads. The seals are also different, make sure the
correct seals are fitted. On metric threaded rams make
sure the seals are fitted the correct way round, as shown
at 6-A and 6-B.
Fig 6.
b Close the tool.
K Fig 7. ( T E-149). The seal
must form a reniform (kidney shape).
Fig 7.
c Before fitting the rod seals check the seal grooves
are free of contamination and sharp edges.
d Locate the seal in the end cap groove.
K Fig 8. ( T E-149). When the seal is in position,
open the tool to release the seal. Make sure the
seal is correctly installed in its grooved and
remove the tool.
Fig 8.
e Fit rod wiper seal 6-A into seal groove. Make sure
the seal is correctly installed as shown.
Note: Some rod wipers, i.e. power track rod, may use a
metal encased seal which is pressed into the housing.
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