Hitachi WH 14DMR Technical Data And Service Manual page 39

(c) Insert the two Steel Balls D5.556 [11] <8> into the steel ball guide groove. Check that the steel balls are
properly inserted in the cam groove. Then release the hand press.
(d) Mount the hammer assembly onto the J297 base for washer (S). With a hand press, push down the top of
the Spindle [18] <15> to compress Hammer Spring (F) [15] <12>. On this condition, mount Stopper (B)
[17] <14> onto the spindle shaft and then release the hand press.
(4) Mounting the hammer assembly to the housing
Raise the housing assembled in step (2) and mount the hammer assembly to the housing being careful of
proper engagement between the Idle Gear Set [19] <16> of the hammer assembly (check that Washer (E)
[22] <19> is mounted on the Spindle [18] <15>) and Ring Gear (C) [21] <18>. After mounting, check that the
hammer assembly turns. If the hammer assembly does not turn, the gears engage improperly.
(5) Mounting the hammer case
Put the Anvil [10] or Anvil (A) Ass'y <7> on the Spindle [18] <15>. Cover it with the Hammer Case [8] <4> and
secure with the four Tapping Screws (W/Sp. Washer) D4 x 30 (Black) [7] <3>.
(6) Mounting Guide Sleeve (D) [4] (Models WH 14DMR/WH 18DMR only)
Insert the two Steel Balls D3.5 [9] into the hole of the
Anvil [10]. Mount Guide Sleeve (D) [4], Guide Spring
(A) [3] and Washer (D) [2] in sequence. Mount the
Retaining Ring [1] into the groove of anvil using the
J295 jigs (A) and (B) for retaining ring as illustrated in
Fig. 18.
NOTE: Be sure to replace the Retaining Ring [1]
with new one because the Retaining Ring
[1] may be deformed and Guide Sleeve (D)
[4] may come off if the deformed
Retaining Ring [1] is used again.
(7) Reassembly of the hook
Check that the V-Lock Nut M5 [42] <39> is mounted into the Hook Ass'y [40] <37>. Mount the Hook Spring
[45] <42> and secure it with the Special Screw (A) M5 [46] <43>. (Make sure to mount the Hook Spring [45]
<42> with its larger diameter side pointing inward the housing.)
(8) Checking the direction of rotation
Check whether the direction of rotation of the Anvil [10] or Anvil (A) Ass'y <7> coincides with the directional
markings on the push-on side of Pushing Button (B) [39] <36>. When Pushing Button (B) [39] <36> is turned
to (R) side, the direction of rotation of the Anvil [10] or Anvil (A) Ass'y <7> should be clockwise, as viewed from
behind.
Retaining Ring [1]
Washer (D) [2]
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Push down.
J295 jig (B) for
retaining ring
J295 jig (A) for
retaining ring
Fig. 18