Alamo GR72 Manual Do Utilizador

GR60/72  02/07

Maintenance Section 5-11

© 2007 Alamo Group Inc.

1.

Install Upper Output Shaft Bearing Cup (item # 12) into Main Housing from the top, Install Output Shaft 

Lower Bearing Cup (item # 2) into Main Housing (item # 1) from the bottom, Make sure both Bearing 
Cup are seated firmly against housing.

2.

Install Lower Bearing Cone (item #2) down over Output Shaft from top making sure it is completely 

seated against shoulder on lower part of Output Shaft.

3.

Insert Output Shaft (item # 8) into Main Housing from the bottom till Lower Bearing Cone is seated into 

Lower Bearing Cup, Slide Upper Bearing Cone down over Output Shaft from the till it seats down 
against  and into upper output Shaft Bearing Cup.

4.

Slide Output Gear (item # 9) down over Output Shaft till it sits against upper Bearing Cone.

5.

Install Output Shaft Bearing Adjusting nut (item # 10) Tighten Nut to set Pre-Load on Output Shaft 

Bearings. Bearing Preload should be from 12 to 14 inch pounds of Rolling Torque.

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.

7.

To Install the 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.

1.

Install Inner Bearing Cup (item # 12) into back of main Housing (item # 1). Make sure Cup is seated 

into Main Housing.

2.

Install Outer Bearing Cup (item # 12) into back of Front Bearing Cover (item # 24). Make sure Cup is 

Seated into front Cover. 

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 Step 7. on Input Shaft Removal.

4.

Install Input Gear (item #27) on to Input Shaft from the front, 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.

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). 

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.

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.

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 longer on Cold days or Shorter on Hot days. Always recheck Oil Level after 
gearbox has been run approximately 1/2 hour.