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MODEL 220
HYDRAULIC
IMPACT HAMMER
IV.
MAINTENANCE AND ADJUSTMENTS
S. CHECKING & REPLACING RECOIL DAMPENER
The thickness of a new recoil dampener with hammer weight on dampener is 1
1/2"(38mm). If the thickness is less than 1 1/4"(32mm), the dampener should be
replaced.
To replace recoil dampener: Loosen wire rope holding drive cap to hammer. Pick
up hammer to allow old dampener to be removed. Replace with new dampener.
Re-tighten clamps on wire rope. Wire rope should be adjusted so that with hammer
lifted 1-2"(25-50mm) gap exists between recoil dampener and hammer base plate
(160451).
See FIG 3, Page II-7, for location of recoil dampener
T. CHECKING & REPLACING CUSHION MATERIAL
With new cushion material, the striker plate flange should be 2" (45mm) above the
top of a DCB-1 Drive Cap (32" leads). If this dimension is reduced by more than
1/2"(13mm), replace the cushion material.
See Section II F Page II-6 ATTACHMENT OF DRIVECAP for instructions on
replacing cushion material.
IV-15
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