Hitachi 236464 manual Torque to 258-285 NSm 190-210 ft-lb

CAUTION

To reduce the possibility of costly damage to the rod (1) and cylinder (2), always use a plastic or wooden block to help drive the rod out of the cylin- der. Never hit the rod with a hammer.

5.Turn the cylinder (2) upside down and strike the top of the rod (1) on a plastic or wooden block until the piston comes free. Pull the rod and piston from the cylinder, being careful not to scratch the parts. See Fig. 6.

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Fig. 6

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6.Shine a light into the cylinder (2) to inspect the inner surface for scoring or wear. Remove the two seals (11) from the cylinder.

7.Place the flats of the piston seat housing (10) in a vise, as shown in Fig. 7.

8.Using an adjustable wrench, unscrew the piston ball housing (9) from the piston seat housing. Be careful to catch the piston ball (12) as you sepa- rate the piston seat housing and ball housing, so that it does not fall and suffer damage.

9.Examine the displacement rod (1) for scratches or other damage. Only if the rod needs replace- ment, place the piston ball housing (9) in a vise and unscrew the rod, using an adjustable wrench on the flats of the rod.

10.Remove the glands and v-packings (P) and the ball (12) from the piston seat housing (10). Inspect the ball seat (E) and ball guides (F) for wear or damage. See Fig. 9.

11.Unscrew the packing nut (8) from the outlet hous- ing (6). Remove the glands and v-packings (T). See Fig. 9.

12.Clean all parts with a compatible solvent and inspect them for wear or damage.

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