ALTERNATIVE METHOD OF ASSEMBLY IN PLACE OF PARAGRAPH 3

ASSEMBLING PINION - TM-55-1930-209-14P-9-4_497

TM-55-1930-209-14P-9-4 Water Purification Barges (NSN 1930-01-234-2165) Electric Power System Manual
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ELECTRICAL EQUIPMENT—Q.18 ALTERNATIVE METHOD OF ASSEMBLY IN PLACE OF PARAGRAPH 3 Assemble commutator shield, yoke, drive end and armature together temporarily without shims at the commutator end and measure distance between pinion face and flange with the shaft pushed towards the drive end. Dismantle starter and add shims inside commutator end shield on the shaft to give 1 in 0.002 in (47,63 0.05 mm) between flywheel and starter flange face. Then assemble commutator end-shield and add shims on the shaft between commutator end shield and the shaft circlip so that the armature end float is 0.062 —0.072 in (1,57—1,83 mm). This gives the desired 1/16 in (1.6 mm) float on the armature assembly. A simple tool for this purpose is shown in Fig. Q.14. The measurement from the square base to the cross member is 1.877 in (47,68 mm) on one side and 1.900 in (48,26 mm) en the other, so that with feelers, the correct size shims can be ascertained. TEST PROCEDURE TESTS ON COMPLETE STARTER 1. Ensure there is NO connection to the main terminal. 2. Pull the pinion forward by hand, approximately 1/16 in (1,6 mm) and let go. The pinion should return to its original position. 3. Energize the solenoid, by means of a battery connected between the solenoid terminal (46) Fig. F.10 and the earth terminal on the commutator end-shield. The pinion must move forward 1 in (6,35 mm) minimum. 4. With the solenoid still energized, pull the pinion slowly forward by hand. The trip collar must act upon the trigger at least k in (3,18 mm) before the pinion reaches its stop. It is possible to feel this action taking place. 5. With the pinion at the end of its outward travel, the ball-lock device should now have come into operation, locking the pinion. There must be approximately 0.005 0.010 in (0,127 — 0,254 mm) play between the pinion and shaft stop. 6. Apply a spring load pressure of 30 lbf (13,6 kgf) to the pinion face, by means of a compression spring balance. The pinion must remain in the forward position. 7. Remove the solenoid connection. The pinion must now return to its normal position in one sharp movement. FIG. Q.14

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