Table of Contents
Advertisement
6
Prepare Parts for Assembly
Oil & Lubrication System
The lubrication system is extremely important to the performance of
the power takeoff. Inspect all parts closely for excessive wear or dam-
age. Perform the following checks.
1.
Inspect the oil for metal shavings, dirt, and consistency. If the
oil appears contaminated, have a lab analysis performed to
determine contamination contents.
2.
Check the magnets for metal shavings. A small amount of metal
shavings is normal. However, excessive build-up indicates gear
and bearing damage. Thoroughly remove all metal shavings from
the magnets. The magnets must be fi rmly fastened to the case.
3.
Check the sump screen. Remove any material that may restrict oil
fl ow through the mesh.
4.
Inspect the seals closely. Look for nicks and tears on all sealing
lips. Any damage is likely to result in a seal leak. Use new seals
and o-rings at every tear down.
5.
Check the pump for easy rotation. If the internal gear does not
spin easily or jams when rotating the crescent plate, replace the
pump. Also inspect for signs of heat/discoloration. If discoloration
is present, replace the pump and heavily grease the splines / tang
with Moly grease.
6.
Check the oil line for damage. Replace if it is dented or kinked.
7.
Inspect the input shaft and oil pump splines for damage and
replace, if necessary.
8.
Verify the relief valve spring and bushing are in good condition
and replace, if necessary.
Inspect Case Halves
Inspect the case halves for cracks and internal wear. If any of the
following conditions exist, replace the damaged parts.
• A crack in either case half.
• Deep gouges in the shifting bores.
• Signs of bearing cup rotation.
MM-2034 / Issued 02-21
Page 25
Preparing the Case & Cover for Seal
Replacement
1.
Pry out all oil seals using a suitable pry bar.
2.
As necessary, use a suitable puller to remove the bearing cups
pressed into the power takeoff case halves.
3.
Clean and inspect the power takeoff assembly and cover for
cracks, worn threaded holes or other wear or damage. Replace
cracked cases. Repair any thread damage. Clean the gasket
surfaces of both case halves using a suitable gasket scraper or
wire wheel.
4.
Press new bearing cups into the case halves as necessary. Refer
to "Assembly" for bearing setting procedures.
5.
Inspect the bearing end play to ensure that it is within
specifi cation. Adjust the end play, if required. Refer to
"Assembly".
6.
Install new oil seals into the case halves. Use the correct Meritor
seal driver and seal. Refer to "Lubrication" for more information.
Refer to the Service Notes page on the front inside cover of this
manual to obtain any special tools needed.
Copyright Meritor, Inc., 2021
Printed in USA
Advertisement
Table of Contents
