PRODEM PRB008 - Bracket and Adapter Maintenance; Fastener Tightening Specifications

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7.7. Bracket and Adapter
Check the bracket and the adapter installed at the top, whenever the chisel is replaced or at least 4 times a
year, to see if there are any cracks. If any crack is found out, the breaker must not be used until it is repaired.
If the bottom of the bracket is worn away, replace the bottom plate as needed.
If it is necessary to repair by welding, contact your local PRODEM dealer for advice.
7.8. Screw tightening
On percussive tools such as hydraulic hammers, the screw fasteners are subjected to particularly high loads
and extreme vibration. During the first 50 operating hours the screw fasteners on the hammer must be
checked daily, and thereafter once a week. Tighten any loose screws taking care not to exceeding the
specified tightening torque below.


 Screws to check and/or re-tighten regularly:
Applied part
Hex. size
mm
Tightening Torque
Applied hammer models
N·m (ft·lbs)
Accumulator body 17 (socket) 500 ~ 550 (370 ~ 410) PRB170 ~ 500
Accumulator cover 14 (socket) 250 ~ 300 (185 ~ 220) PRB170
Through bolts
22 280 ~ 300 (200 ~ 220) PRB008
30 400 ~ 450 (300 ~ 330) PRB010, 020
36 450 ~ 500 (330 ~ 370) PRB030
41 800 ~ 850 (590 ~ 630) PRB040(H), 050
50 950 ~ 1050 (700 ~ 770) PRB060, 100
55 1500 ~ 1600 (1110 ~ 1180) PRB150
60 2400 ~ 2500 (1770 ~ 1850) PRB170
65 2400 ~ 2500 (1770 ~ 1850) PRB200, 250
71 3400 ~ 3600 (2500 ~ 2650) PRB700
75 3400 ~ 3600 (2500 ~ 2650) PRB300
85 4200 ~ 4400 (3100 ~ 3250) PRB400
90 4900 ~ 5100 (3600 ~ 3750) PRB500
Side bolts
on the bracket
NA
Version
27 280 ~ 320 (200 ~ 230) PRB008
30 300 ~ 350 (220 ~ 260) PRB010, 020, 030
41 550 ~ 600 (400 ~ 440) PRB040(H)
46 850 ~ 950 (630 ~ 700) PRB050
Mounting
adapter
19 100 ~ 120 (75 ~ 90) PRB008, 010, 020, 030
30 550 ~ 600 (410 ~ 440) PRB040(H), 050, 060, 100, 150
46 800 ~ 1000 (590 ~ 740) PRB170, 200, 250, 300
55 1000 ~ 1200 (740 ~ 890) PRB400, 500, 700