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Model 28L Service Manual, SM28LM-AA  Page 4

Eskridge, Inc. Olathe, Ks. 913-782-1238                                                                                                                                    www.eskridgeinc.

com

Unit Disassembly Procedure

All number references refer to the exploded drawing on Page 2.
1)  Scribe a diagonal line across the outside of the unit from the 

cover 

(3)

 to the base 

(1)

 before disassembly to aid in the 

proper positioning of pieces during reassembly.

2)  Remove drain plugs 

(30)

 and drain oil from unit. The oil will 

drain faster and more completely if warm. Tilt the unit so that 

the drain port in the base 

(1)

 points downward to drain as 

much oil as possible.

3)  Remove the six hex-head capscrews 

(25A)

 and lock washers 

(25G)

.

4)  Remove cover 

(3)

, and inspect o-ring 

(16C)

. Discard o-ring if 

damaged or deformed.

5) 

Remove the lock ring 

(35C)

 using a heel bar or puller. Be 

careful not to pry against the bearing cage 

(20A)

.  Remove 

split ring segments 

(35B)

 and shims 

(35A)

.

Caution: Since the output shaft is no longer retained, care 

should be taken to avoid personal injury. Care should also be 

taken not to damage the shaft while pressing through base.

6) Base 

(1)

 should be set spindle side down, as shown, on a 

plate or table. Press output shaft through the bottom of base 

by applying a load to top end (internal end) of shaft until it 

passes through inner shaft bearing cone 

(20A)

. Shaft seal 

(16A)

 will also be pressed out and will likely be damaged.

7)  A gear puller or bearing splitter may be used to remove the 

outer bearing cone 

(20A)

 from the shaft 

(2)

. If reusing old 

bearing cone, do not pull on or damage roller cage. Remove 

the shaft seal 

(16A)

 and v-ring seal 

(16B)

 for inspection or 

replacement. 

8)  Inspect inner and outer bearing cups 

(20B)

. If cups are dam-

aged, drive them out using a brass drift or remove with a pull-

er.

Unit Assembly Procedure

1)  Clean all foreign material from oil plugs 

(30)

.

2) 

Place base 

(1)

 (output side up, opposite shown) on the table.

3) 

Apply a layer of lithium or general purpose bearing grease to 

the roller contact surface of outer bearing cup 

(20B)

.

4)  Lubricate inner lip of v-ring seal 

(16B)

 and fit onto the shaft 

(2)

 seal diameter and against the shoulder.

5)  Lubricate inner lip of shaft seal 

(16A)

 and slide it onto the 

shaft 

(2)

 until it fits snugly over the shaft seal diameter with 

the open side of the seal toward the inside of the unit.

6)  Press outer bearing cone 

(20A)

 (large end down as shown) 

onto the shaft until it seats against the shoulder. 

Note: Press bearing cone onto output shaft by pressing on 

inner race only. DO NOT press on roller cage, as it may dam-

age bearing.

7)  Place the shaft 

(2)

 with the bearing 

(20A)

, shaft seal 

(16A)

 , 

and v-ring seal 

(16B)

 into the base 

(1)

.

8)  Flip this assembly, resting it on the end of the output shaft 

(2)

.

9)  Place thin shims (1/8 to 3/16 inch thick) between shaft seal 

(16A)

 and face of spindle 

(2)

. Being careful not to damage 

v-ring seal 

(16B)

, press lightly on base 

(1)

 until shaft seal is 

flush with base. Remove shims.

10)  Apply a layer of lithium or general purpose bearing grease 

to the roller contact surface of the inner cup 

(20B)

. Press the  

inner bearing cone 

(20A)

 (large end up as shown) onto the 

shaft 

(2)

 until it is seated against inner bearing cup 

(20B)

11)  Bearing preload may result in a rolling torque that varies be-

tween 35 to 65 in-lbs. The bearing preload should be tailored 

to your application; a low-speed application may require a 

high pre-load, high-speed applications usually benefit from 

low pre-load. Adding shims 

(35A)

 will increase the pre-load 

on the bearing set. Determine your pre-load requirement 

and install shims to obtain this pre-load. Install the Load-N-

Lock segments 

(35B)

 over the shims and into the groove 

in the output shaft.  With the Load-N-Lock segments firmly 

installed place lock ring 

(35C) 

over the segments.

12)  Lubricate o-ring 

(16C)

 and install in the pilot of the 

 

cover 

(3)

. Noting the scribed line made during disassembly, 

install the cover.

13)  Install the six hex-head cap-screws 

(25A)

 with lockwashers 

(25G)

Torque the cap-screws to 25 ft-lb dry or 18 ft-lb if 

the fasteners are lubricated

.

14)  Ensure the unit spins freely by using a splined shaft to drive 

the shaft 

(2)

.

15)  Fill the unit  with GL5 EP 80/90 gear oil to the proper level, 

as specified, using the oil fill hole in the cover 

(3)

The unit is now ready to use.

Summary of Contents for 28

Page 1: ...WARNING While working on this equipment use safe lifting procedures wear adequate clothing and wear hearing eye and respiratory protection NOTE Individual customer specifications mounting case output shaft brake assembly etc may vary from exploded drawing and standard part numbers shown If applicable refer to customer drawing for details ...

Page 2: ... WASHER 5 16 01 166 0110 6 25G PIPE PLUG 3 8 MAGNETIC 01 207 0070 2 30 MISCELLANEOUS 35 SHIM 20 004 1091 35A SPLIT RING 20 L SEGMENT 20 004 1362 1 35B LOCK RING 20L 20 004 1372 1 35C ESKRIDGE 25A 25G 30 3 35C 35B 35A 20A 20B 1 30 20B 20A 16A 16B 2 MODEL 28 BEARING ADAPTER EFFECTIVE FROM SN 119739 02 03 2014 QUANTITY DEPENDANT UPON DESIRED BEARING PRELOAD X28LM ECN REV A 09 03 2020 HWP 16C ITEM 3 C...

Page 3: ...es regardless of ambient temperature If your unit was specified shaft up or with a Z option a grease zerk was provided in the base housing For shaft up operation the output bearing will not run in oil and must be grease lubricated Use a lithium based or general purpose bearing grease sparingly every 50 operating hours or at regular maintenance intervals Over greasing the output bearing should be a...

Page 4: ... seal 16B and fit onto the shaft 2 seal diameter and against the shoulder 5 Lubricate inner lip of shaft seal 16A and slide it onto the shaft 2 until it fits snugly over the shaft seal diameter with the open side of the seal toward the inside of the unit 6 Press outer bearing cone 20A large end down as shown onto the shaft until it seats against the shoulder Note Press bearing cone onto output sha...

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