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Assembly of the Motor, Throttle and Exhaust Element

Install the Exhaust Element (9, 9A) over the Exhaust Element (9B) 

and insert both inside the Exhaust Cover (8). Install the Exhaust 

Cover containing both Elements on the Hose Joint until it seats.

Install the O-ring (10) in the Motor Housing (1).

Thread the Hose Joint with the Exhaust components into the 

Motor Housing and tighten to 18-26 ft-lb (25-35 Nm) torque.

Install the Throttle Rod Seal (13) in the groove on the large hub of 

the Throttle Rod (14).

Put the Reverse Lever (25) on the Reverse Valve (27) and secure it 

with the Reverse Lever Pin (26).

Start the Reverse Valve into the Throttle Bushing (19). Install 

the Reverse Lever Detent Spring (21) in the hole in the Bushing. 

Set the Reverse Lever Detent Ball (22) on the Spring and while 

holding it in place, align the Ball with the detent hole in the 

Bushing. Push the Valve into the Bushing until the Reverse Lever 

Detent Ball seats in the detent hole.

Insert the Throttle Rod, shaft end first, through the rear of the 

Throttle bushing and through the Reverse Valve so that the hub of 

the Throttle Rod seats against the end of the Throttle Bushing.

Install the Trigger (24) on the Throttle Rod and secure it with the 

Trigger Pin (23).

Install the Throttle Retaining Pin (12) in the Housing, making sure 

that it captures the Throttle Bushing Assembly.

Using an arbor press and the End Plate Jig that contacts the outer 

ring of the bearings, press the Front End Plate Bearing (42) into 

the Front End Plate (41) and the Rear End Plate Bearing (35) into 

the Rear End Plate (36). (Refer to Dwg. TPD1274)

END PLATE

TUBING

BEARING

(Dwg. TPD1274)
11. Stand the Rotor (39) on the table of an arbor press. It should be 

upright on a flat metal plate having a clearance hole for the shaft. 

The shaft with the hex must be upward.

12. Place a 0.001” (0.025 mm) shim on the upward surface of the large 

portion of the rotor body. Using a piece of tubing that contacts 

the inner ring of the bearing, press the Rear Rotor Bearing and 

Rear End Plate onto the shaft of the Rotor until the End Plate 

contacts the shim. Remove the shim. (Refer to Dwg. TP2202)

BALL BEARING

ROTOR

END PLATE JIG

SHIM SPACE

(0.02~0.03mm)

REAR END PLATE

(Dwg. TP2202)
13. Coat each Vane (40) with a thin film of oil and insert a Vane into 

each of the rotor vane slots with the straight edge of the Vane 

outward.

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

14. Install the Cylinder (37) over the Vanes and Rotor with the end of 

the Cylinder having the Rear End Plate Alignment Pin (38). Make 

certain the Pin enters the hole in the face of the Front End Plate. 

(Refer to Dwg. TP2203).

ROTOR

PIN

PIN

VANE

CYLINDER

BALL BEARING

BALL

BEARING

FRONT

END PLATE

REAR END PLATE

(Dwg. TP2203)
15. Place the Front End Plate and Bearing against the face of the 

Cylinder, Bearing end trailing.

16. Install the Motor Housing Cover O-rings (33) in the grooves in the 

rear of the Motor Housing.

17. Insert the assembly into the rear of the Motor Housing. It may be 

necessary to tap the assembly into position with a brass or plastic 

hammer.

18. Install the Motor Housing Cover Gasket (32) and Motor Housing 

Cover (31) on the rear of the Motor Housing. Secure it with the 

motor Housing Cover Bolts (28). Tighten to 40-50 in-lb (5.1- 

5.6 Nm) torque.

MOTOR

ASSEMBLY

(Dwg. TP2204)

Assembly of the Impulse Mechanism

Insert the Relief Valve (49, 50, 51, 52, 53) into the Liner (48) as 

shown in manual 16574782.

Place a Blade (54) into one of the slots of the Drive Shaft (56) with 

the assembly holes inward.

From the opposite side of the Shaft, set a Blade Spring (55, 55A, or 

55B) in the hole of a blade.

Compress the Springs with the Blades until both Blades are flush 

with the Drive Shaft and install the assembly in the Liner with the 

output end of the Drive Shaft protruding out the end of the Liner  

containing Adjust Bolt. Make certain the ends of the Blades are 

flush with the ends of the Liner. (Refer to Dwg. TPD1284).

(Dwg. TPD1284)

1.

2.

3.

4.

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