HY13-1526-001-M1/US
Torqmotor™ Service Procedure
TC, TS, TB, TE and TJ Series
Parker Hannifin Corporation
Hydraulic Pump/Motor Division
Greeneville, TN 37745 US
13
In July 2012, a change was made to our small frame (Series TC, TS, TB, TE and TJ) low speed high
torque Torqmotors™.
The motors are comprised of six sections. There is a seal between each section to resist external
leakage. The design of the motor dictates that it be assembled from front (shaft end) to rear. This
means that the motor must be assembled shaft down. Some of the O-ring grooves in the current de-
sign are facing down during assembly. To keep the O-rings in place during assembly, they are coated
with grease.
After assembly, this grease can seep out. This is often misdiagnosed as external hydraulic fluid leak-
age, causing the customer to think that the motor is faulty. It also can cause problems when the mo-
tor is painted.
To correct this problem, we have re-positioned the section O-ring grooves on five of the six parts (all
but the front housing) so that the O-ring grooves are all facing up during assembly. It will now be pos-
sible to install the O-rings dry, eliminating the problem.
The part numbers of the five re-designed parts will change, but the complete model number
(TE0080AS100AAAA etc) will not change. The change occurred on July 1, 2012. The new design is
identified by the Julian date code on the motor. All TC, TS, TB, TE and TJ motors dated after Julian
date 183-12 (183
rd
day of 2012) will be of the newer design. Seals and seal kits will be unaffected.
Typical model number changes and seal groove locations are illustrated on page 15.
MADE IN USA
18312- ####
MADE IN USA
18212- ####
Notice: For individual part numbers for these series TC, TS, TB, TE and TJ prior to
manufactory date code of 182-2012 please refer to the parts list on pages 18-26.
Torqmotor™ Seal Letter
Made before July 1, 2012
Made on or after July 1, 2012