Section V. DESCRIPTION, OPERATION, AND DATA (MODEL WND-7-28)

TM 9-2520-246-34

Section V. DESCRIPTION, OPERATION, AND DATA

(MODEL WND-7-28)

5-15. Data.

5-12. General. Because power takeoff model WND-

7-28 and power takeoff model WN-7-28 are identical,

National stock number . . . . . . . . . . 2520-00-706-1136

except for the added accessory drive on model WND-

Ordnance number . . . . . . . . . . . . . . . . . . . . . . . 7061136

7-28, only the accessory drive will be covered in this

Manufacturer . . . . . . . . . . . Spicer Div. - Dana Corp.

section. For the disassembly and assembly pertaining

Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . WND-7-28

to the remaining portion of power takeoff model

Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Heavy-duty

WND-7-28, refer to section II for power takeoff

Speeds . . . . . . . . . . . . . . . . . . . . . . 2 forward, 1 reverse

model WN-7-28 and use these same disassembly and

Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transmission

assembly procedures.

Input gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Helical

5-13. Description. Power takeoff model WND-7-28

Output shaft (front) . . . . . . . . . . . . . . . . . . 1 in. dia,

is actually a model WN-7-28 power takeoff with an

5/16 in. keyway

accessory drive attached. This modification is

Output shaft (rear) . . . . . . . . . . . . . . . . . . . . . 7/8 in. dia,

accomplished by removing the output shaft rear

5/16 in. keyway

bearing cap from power takeoff model WN-7-28 and

replacing it with an oversized bearing cap called a rear

Bearings:

output shaft housing (fig. 5-19). The rear output shaft

Output shaft (front) . . . . . . . . . . . . . Two-ball type

housing contains a shifter shaft and fork that controls

Output shaft (rear) . . . . . . . . . . . . . . . . One-ball type

the movement of the sliding clutch sleeve. (See fig. 5-

Input gear . . . . . . . . . . . . . . . . . . . . Two-roller type

20.) The sliding sleeve clutch slides back and forth on

Reverse gear . . . . . . . . . . . . . . . . . . Two-roller type

the output shaft gear, thus engaging and disengaging

Horsepower delivered:

100 rpm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7

the output shaft.

500 rpm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5-14. Operation. For operation of power takeoff

1000 rpm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

model WND-7-28 see section I, power takeoff model

Gear pitch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7/9 in.

WN-7-28, description, operation, and data.

Backlash (allowable) . . . . . . . . . . . . . . . . . . . . 0.008 in.

Figure 5-19. Power Takeoff Model WND-7-28.

5-11