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 110 of 153
TM 9-2520-246-34
Section V. DESCRIPTION, OPERATION, AND DATA
(MODEL WND-7-28)
5-12. General.
Because power takeoff model WND-
7-28 and power takeoff model WN-7-28 are identical,
except for the added accessory drive on model WND-
7-28, only the accessory drive will be covered in this
section. For the disassembly and assembly pertaining
to the remaining portion of power takeoff model
WND-7-28, refer to section II for power takeoff
model WN-7-28 and use these same disassembly and
assembly procedures.
5-13. Description.
Power takeoff model WND-7-28
is actually a model WN-7-28 power takeoff with an
accessory drive attached. This modification is
accomplished by removing the output shaft rear
bearing cap from power takeoff model WN-7-28 and
replacing it with an oversized bearing cap called a rear
output shaft housing (fig. 5-19). The rear output shaft
housing contains a shifter shaft and fork that controls
the movement of the sliding clutch sleeve. (See fig. 5-
20.) The sliding sleeve clutch slides back and forth on
the output shaft gear, thus engaging and disengaging
the output shaft.
5-14. Operation.
For operation of power takeoff
model WND-7-28 see section I, power takeoff model
WN-7-28, description, operation, and data.
5-15. Data.
National stock number . . . . . . . . . . 2520-00-706-1136
Ordnance number . . . . . . . . . . . . . . . . . . . . . . . 7061136
Manufacturer . . . . . . . . . . .
Spicer Div. - Dana Corp.
Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . WND-7-28
Type
. . . . . . . . . .
. . . . . . . . . . . . . . . .
. . . .
Heavy-duty
Speeds
. . . . . . . . . . . . .
. . . . . . . . .
2 forward, 1 reverse
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transmission
Input gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Helical
Output shaft (front) . . . . . . . . . . . . . . . . . . 1¼ in. dia,
5/16 in. keyway
Output shaft (rear) . . . . . . . . . . . . . . . . . . . . . 7/8 in. dia,
5/16 in. keyway
Bearings:
Output shaft (front) . . . . . . . . . . . . . Two-ball type
Output shaft (rear)
. . . . .
. . . . . . . . . . .
One-ball type
Input gear . . . . . . . . . . . . . . . . . . . . Two-roller type
Reverse gear
. . . . .
. . . . . . . . . . . . .
Two-roller type
Horsepower delivered:
100 rpm
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . .
2.7
500 rpm
. . . . .
. . . . . . . . . . . . . . . . . . . .
. . . .
. . . . .
13
1000 rpm
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . .
27
Gear pitch
. . . . . . . . .
. . . . . . . .
. . . . . . . .
. . . . .
7/9 in.
Backlash (allowable)
. . . . . . . . . . . . .
. . . . . . .
0.008 in.
Figure 5-19. Power Takeoff Model WND-7-28.
5-11
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