TM-9-2520-246-34
TRANSMISSION MODEL 3052, NSN 2520-00-347-4520
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT; MAINTENANCE MANUAL
MAY 1978
TM-9-2520-246-34 - Page 106 of 153
TM 9-2520-246-34
5-7. Assembly Sequence — Power Takeoff
g.
Output shaft front bearing cap and companion
(Model WN-7-28).
flange key. (See fig. 5-8.)
a.
b.
c.
d.
e.
and
Shifter shaft boot and seal. (See fig. 5-15.)
h.
Output and reverse shaft rear bearing cap. (See
fig. 5-7.)
Output shaft front bearing. (See fig. 5-14.)
i.
Input gearshaft and input gear. (See fig. 5-5 and
Reverse gearshaft rear bearing. (See fig. 5-13.)
5-6.)
Reverse gear. (See fig. 5-12.)
j.
Shifter shaft and shifter fork. (See fig. 5-4.)
Output shaft and high-speed gear. (See fig. 5-10
k.
Power takeoff cover, poppet retainer, and poppet
5-11.)
spring and ball. (See fig. 5-3.)
Output shaft rear bearing. (See fig. 5-9.)
f .
Section Ill. TEST AND ADJUSTMENT (MODEL WN-7-28)
5-8. General.
Tests and adjustments can either be
b. Adjustments.
accomplished by installation on the vehicle or on a
transmission coupled to an engine prepared for a
(1) There are no adjustments on the power
dynamometer test.
takeoff assembly.
a. Operation.
Test power takeoff WN-7-28 for the
(2) Refer to TM 9-2320-209-20/1 for the power
following
takeoff linkage adjustment.
(1) Quiet operation.
5-9. Lubrication.
Lubrication of the power takeoff
(2) Smooth and positive shifting.
is provided by the transmission. Refer to LO 9-2320-
(3) Check for lubricant leaks.
209-12/1 for lubrication specifications.
Section IV. REPAIR AND REPLACEMENT STANDARDS (MODEL WN-7-28)
5-10. General.
The repair and replacement standards
included herein give the minimum, maximum, and key
clearance of new parts. The standards also give wear
limits which indicate the point to which a part or parts
may be worn before replacement, in order to receive
maximum service with minimum replacement.
Normally, all parts which have not been worn beyond the
dimensions shown in the “Wear Limits” column, or
damaged by corrosion, will be approved for service. An
asterisk (*) in the “Wear Limits” column indicates that
the part or parts should be replaced when worn beyond
the limits given in the “Size and Fit of New Parts”
column. In the “Size and Fit of New Parts” and “Wear
Limits” columns the letter “L” indicates a loose fit
(clearance) and the letter "T" indicates a tight fit
(interference).
5-11. Repair and Replacement Standard Points
of Measurement.
Figures 5-16, 5-17, and 5-18 and
corresponding tables 5-1, 5-2, and 5-3 provide the
repair and replacement standard points of
measurement for power takeoff model WN-7-28.
5-7
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