Dodge HYDROIL TORQUE-ARM HXT325C, Parts Replacement Manual

4

GUIDELINES FOR TORQUE-ARM REDUCER 

LONG-TERM STORAGE

During periods of long storage, or when waiting for delivery or 
installation of other equipment, special care should be taken 
to protect a gear reducer to have it ready to be in the best 
condition when placed into service.

By taking special precautions, problems such as seal leakage 
and reducer failure due to the lack of lubrication, improper 
lubrication quantity, or contamination can be avoided. The 
following precautions will protect gear reducers during periods 
of extended storage:

Preparation

1.  Drain the oil from the unit. Add a vapor phase corrosion 

inhibiting oil (VCI-105 oil by Daubert Chemical Co.) in  
accordance with Table 4.

2.  Seal the unit air tight. Replace the vent plug with a standard 

pipe plug and wire the vent to the unit.

3.  Cover the shaft extension with a waxy rust preventative 

compound that will keep oxygen away from the bare metal 
(Non-Rust X-110 by Daubert Chemical Co.).

4.  The instruction manuals and lubrication tags are paper 

and must be kept dry. Either remove these documents 
and store them inside or cover the unit with a durable 
waterproof cover which can keep moisture away.

5.  Protect the reducer from dust, moisture, and other 

contaminants by storing the unit in a dry area.

6.  In damp environments, the reducer should be packed 

inside a moisture-proof container or an envelope of 
polyethylene  containing a desiccant material. If the reducer 
is to be stored outdoors, cover the entire exterior with a 
rust preventative.

When Placing the Reducer into Service

1.  Assemble the vent plug into the proper hole.
2.  Clean the shaft extensions with a suitable solvent.
3.  Fill the unit to the proper oil level using a recommended 

lubricant. The VCI oil will not affect the new lubricant.

4.  Follow the installation instructions provided in this manual. 

REPLACEMENT OF PARTS

A DODGE TORQUE-ARM Speed Reducer can be disassembled 
and reassembled by careful attention to the instructions 
following, using tools normally found in a maintenance 
department.

Cleanliness is very important to prevent the introduction of dirt 
into the bearings and other parts of the reducer. A tank of clean 
solvent, an arbor press, and equipment for heating bearings 
and gears should be available for shrinking these parts on 
shafts.

Our factory is prepared to repair reducers for customers who 
do not have proper facilities or who for any reason desire 
factory service.

The oil seals are of the rubbing type and considerable care 
should be used during disassembly and reassembly to avoid 
damage to the surface on which the seals rub.

The keyseat in the input shaft as well as any sharp edges on 
the output hub should be covered with tape or paper before 
disassembly or reassembly. Also be careful to remove any burrs 
or nicks on surfaces of the input shaft or output hub before 
disassembly or reassembly.

ORDERING PARTS

When ordering parts for reducer, specify reducer size number, 
reducer serial number, part name, part number and quantity.

It is strongly recommended that when a pinion or gear is 
replaced, the mating gear or pinion be replaced also.

If the large gear on the output hub must be replaced, it is 
recommended that an output hub assembly with a gear 
assembled on the hub be ordered to secure undamaged 
surfaces on the output hub where the oil seals rub.

However, if it is desired to use the old output hub, press the 
gear and bearing off and examine the rubbing surface under 
the oil seal carefully for possible scratching or other damage 
resulting from the pressing operation. To prevent oil leakage at 
the shaft oil seals the smooth surface of the output hub must 
not be damaged.

If any parts must be pressed from a shaft or from the output 
hub, this should be done before ordering parts to make sure 
that none of the bearings or other parts are damaged in 
removal. Do not press against outer race of any bearing.

Because old shaft oil seals may be damaged in disassembly it 
is advisable to order replacements for these parts.

If replacing a bearing or a shaft, it is advisable to order a set 
of shims for adjustment of bearings on the shaft assembly. If 
replacing a housing, a set of shims should be ordered for each 
shaft assembly because the adjustment of the bearings on each 
shaft assembly is affected.