10
95-03010
NOTES: 1.There is NO OIL IN ISR!
2. Pump fasteners are supplied in
a separate bag.
(On previously installed units, see in-service
pump preparation on page 11.)
1. Remove two 1/2-13 hex-head cap screws
and jam nuts from support foot of rear case.
(Figure 3)
NOTE: On Model 239 support foot screws are
1/2-13 x 2 hex-head machine screws.
2. Remove six hex-head cap screws and
lockwashers from gear case assembly.
NOTE: On Model 239 there are eight hex-
head cap screws.
3. Separate rear case assembly from front
case assembly. (Figure 3)
NOTE: Use a brass or aluminum pry bar to
separate cases if necessary.
4. Remove old silicone sealant from case
halves. (Figure 3)
5. Remove the thin spacer from idler shaft.
6. Pull the idler shaft and the spacer from the
front case assembly.
There are two different
idler shaft assemblies used depending on ra-
tio of ISR. (Figure 4)
NOTE: It may be necessary to use a brass or
aluminum pry bar to remove the idler shaft.
7. Remove the retaining ring from the output
gear shaft. Slide the spacer off the shaft.
(Spacer not used on Model 49 ISR.)
(Figure 5)
8. Slide the output gear and key off the shaft.
9. The front case is now ready to install on the
pump.
An ISR received as a separate unit will be attached to an existing pump.
2
3
4
Figure 3
KEY
OUTPUT GEAR
FRONT CASE
RETAINING RING
Figure 4
Figure 5
INSTALLATION
1
IDLER SHAFT
ASSEMBLY
5
6
SPACER
SPACER
PREPARING ISR FOR PUMP INSTALLATION
OUTPUT SHAFT
Triplex Sales
1-847-839-8442
www.triplexsales.com
