MAINTENANCE
FN180/FN120 07/12
Maintenance Section 5-34
© 2012 Alamo Group Inc.
MAINTENANCE
INPUT SHAFT INSTALLATION
STEP I
insert short and long spacer (29 & 24) in proper location on shaft. Press rear bearing (20) on to shaft.
STEP II
Insert shaft through rear housing bore through gear. Drive front bearing into place against gear.
STEP III
Press bearing cups into both front and rear bores.
STEP IV
Bolt front cap (4) in place using same shim pack present when disassembled. Bolt rear cap (21) in place using
same shim pack also.
STEP V
Check bearing preload and gear back lash. Gear back lash should be.015” to .025”. If back lash is tight add
shim to front cap and remove shim from rear cap. Reverse procedure if back lash is to large. Check input shaft
preload - push and pull on shaft to see if end play exists and if so remove shim from back cap (21). The only
method to measure preload is to rotate input shaft turning whole box and reading should be 30-50 in/lbs.
STEP VI
Remove front and rear caps, apply gasket sealant, and reinstall caps and torque bolts to required torque,
Recheck using torque step 5.
STEP VII
Press input shaft seal (6) into front cap (4). Install top cover (26) with gasket (31). Gearbox is ready to fill with
oil.
NOTE: Be sure seal plate (34) is installed using capscrew (33). Failure to install plate could result in seal
pushing out of gearbox.
Summary of Contents for FN120
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Page 11: ...Safety Section 1 1 2012 Alamo Group Inc SAFETY SECTION ...
Page 28: ...SAFETY FN180 FN120 07 12 Safety Section 1 18 2012 Alamo Group Inc SAFETY Decal Description ...
Page 29: ...SAFETY FN180 FN120 07 12 Safety Section 1 19 2012 Alamo Group Inc SAFETY ...
Page 30: ...SAFETY FN180 FN120 07 12 Safety Section 1 20 2012 Alamo Group Inc SAFETY ...
Page 31: ...SAFETY FN180 FN120 07 12 Safety Section 1 21 2012 Alamo Group Inc SAFETY ...
Page 32: ...SAFETY FN180 FN120 07 12 Safety Section 1 22 2012 Alamo Group Inc SAFETY ...
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Page 37: ...SAFETY FN180 FN120 07 12 Safety Section 1 27 2012 Alamo Group Inc SAFETY ...
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Page 91: ...Introduction Section 2 1 2012 Alamo Group Inc INTRODUCTION SECTION ...
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Page 97: ...Assembly Section 3 1 2012 Alamo Group Inc ASSEMBLY SECTION ...
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Page 107: ...Operation Section 4 1 2012 Alamo Group Inc OPERATION SECTION ...
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Page 157: ...Maintenance Section 5 1 2012 Alamo Group Inc MAINTENANCE SECTION ...
Page 160: ...MAINTENANCE FN180 FN120 07 12 Maintenance Section 5 4 2012 Alamo Group Inc MAINTENANCE ...
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Page 192: ...SEGURIDAD FN180 FN120 07 12 Sección de Seguridad 1 27 2012 Alamo Group Inc SEGURIDAD ...
Page 193: ...SEGURIDAD FN180 FN120 07 12 Sección de Seguridad 1 26 2012 Alamo Group Inc SEGURIDAD ...
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Page 200: ...SEGURIDAD FN180 FN120 07 12 Sección de Seguridad 1 19 2012 Alamo Group Inc SEGURIDAD ...
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Page 204: ...SEGURIDAD FN180 FN120 07 12 Sección de Seguridad 1 15 2012 Alamo Group Inc SEGURIDAD ...
Page 218: ...Sección de Seguridad 1 1 2012 Alamo Group Inc SECCIÓN DE SEGURIDAD ...
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