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MAINTENANCE
SR20M/SR14M 12/96 Maintenance Section 5-26
MAINTENANCE
© 2004 Alamo Group Inc.
Step 6. Using Soft Metal (Brass or Aluminum) Pin Strike both ends of Shaft with a hammer and recheck the
Bearing Pre-Load, This is to ensure Bearings and components are centered and seated. If Bearing
Pre-Load is OK insert Cotter Pin (item # 11) and Bend ends.
Step 7. Output Seal, Put a light coat of Grease on ID of Seal or on OD of shaft where Seal rides. Install the
Output Seal using a Seal Driver.
Step 1. Install Inner Bearing Cup (item # 12) into back of main Housing (item # 1), Make sure Cup is seated
into Main Housing.
Step 2. Install Outer Bearing Cup (item # 12) into back of Front Bearing Cover (item # 24). Make sure Cup
is Seated into front Cover.
Step 3. Install Spacer (item # 13) onto Back side of Input Shaft (item # 26), Install Spacer (item # 28) onto
input Shaft (item # 26) from the front. Install Shims (item # 29,30 & 31) onto input Shaft from the
front. For quantity of Shims refer to how many were removed.
Step 4. Install Input Gear (item #27) on to Input Shaft From, Install Outer Bearing Cone (item # 12) on to
input shaft and slide down till it seats against Gear. Install Inner Bearing Cone (item # 12) Onto input
shaft.
Step 5. Slide Input Shaft with all components down into Main Housing till Inner Bearing Cone is seated into
Inner Bearing Cup. Look at Input Gear and Output at this time, Input Gear should not be held up by
Outer Gear, if it is it will be required to add Shims (item # 29,30 & 31). If Input Gear and Output Gear
Seem to far away from each other remove some Shims (item # 29,30 & 31).
Step 6. Input Seal (item # 25) can be installed now or wait till later. With Shims (item # 20,21 & 22) lower
Input Bearing Cap (item # 24) down over Input Shaft. Install Bolts (item # 23) into Bearing Cap and
tighten them, Check Bearing Pre-Load and Gear Back Lash. Bearing Preload should be from 12 to
14 pounds of Rolling Torque, Gear Back Lash should be from .016" to .021". If these are not, shims
will have to be removed or added to get these readings.
Step 7. Install Top Cover (Item # 18) and Gasket (item # 19), Install Pressure Vent Plug (item # 16) with
Sealing Washer (item # 17), Vent Plug must be 5 pounds pressure relief type.
Step 8. Fill Gearbox with Oil, remove Oil Level Plug (item # not shown) on side of Main Housing, Remove
the vent Plug (item # 16) and fill with oil till oil starts to seep out of Oil Level Plug, Stop and wait
about 20 minutes so oil will have time to seep down around Output Shaft bearings then finish filling
with oil, This procedure may take longeer on Cold days or Shorter on Hot days. Always recheck Oil
Level after gearbox has been run approximately 1/2 hour.
INPUT SHAFT REMOVAL