Every week
♦
Clean the hydraulic breaker carefully.
♦
Check the wear bushing's wear and maximum
inner wear limits.
The wear bushing must be replaced when the
inner diameter (A) has reached its maximum wear
limit, see section "Wear limits" and "Replacing the
insertion tool bushing".
♦
Check the working tool for wear.
The working tool must be replaced when the outer
diameter (B) has reached its minimum wear limit.
See section "Wear limits".
Too large clearance can make the working tool
break and the piston can be damaged.
♦
Check the scraper ring (C) for wear and function,
replace if necessary.
♦
Check the breaker and the adapter plate for cracks
and wear.
♦
Check that the accumulator screws are properly
tightened. The correct tightening torque is found
in the spare parts list.
The working tool may never be sharpened by forging.
Sharpening must only be performed by milling,
grinding, or turning.
Wear limits
B mm (in.)A mm (in.)
38 (1.5)42 (1.6)SB 52
43 (1.7)47 (1.8)SB 102
48 (1.9)52 (2.0)SB 152
63 (2.5)68 (2.7)SB 202
78 (3.1)83 (3.3)SB 302
78 (3.1)83 (3.3)SB 302 SC
92 (3.6)98 (3.85)SB 452
92 (3.6)98 (3.85)SB 452 SC
97 (3.8)103 (4.1)SB 552
Replacing the insertion tool bushing
The insertion tool bushing is kept in place by the tool
retainers. A new bushing has a slip fit.
1. Remove scraper ring and bushing. If a worn out
bushing is stuck, use a sliding hammer to remove
it.
2. Carefully clean the bore and the bushing seat
area.
3. Mount new O-rings, lubricate and mount the
bushing.
4. Use a plastic sledgehammer to insert the
bushing.
5. Rotate the bushings until the tool retainers find
their position at the bushing.
6. Mount a new scraper ring.
21© 2014 Construction Tools PC AB | No. 9800 0648 01l | 2014-06-11
Original instructions
Safety and operating instructionsSB 52, 102, 152, 202, 302, 302 SC, 452, 452 SC, 552
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