◆
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 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
A mm (in.) B mm (in.)
SB 52 42 (1.6) 38 (1.5)
SB 102 47 (1.8) 43 (1.7)
SB 152 52 (2.0) 48 (1.9)
SB 202 68 (2.7) 63 (2.5)
SB 302 83 (3.3) 78 (3.1)
SB 302 Tunnel 83 (3.3) 78 (3.1)
SB 452 98 (3.85) 92 (3.6)
SB 452 Tunnel 98 (3.85) 92 (3.6)
SB 552 103 (4.1) 97 (3.8)
Replacing the working tool bushing
(Not valid for SB 302 Tunnel and SB 452 Tunnel.
This work has to be carried out by your authorised
workshop, due to press fitted bushing.)
The working 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.
Every year
Overhauling must be done after one year of
continuous operation. Overhauling must for safety
reasons be performed by authorised personnel at
an authorised workshop.
Storage
WARNING Hydraulic breaker and working
tool are heavy
If the breaker or working tool topple over or fall
down it can result in material damage and personal
injury.
►
Store the hydraulic breaker and the working tool
so that falling or rolling down is prevented.
If the hydraulic breaker is not used for a long time,
the following steps have to be considered to
protect the hydraulic breaker from corrosion:
SB 52, 102, 152, 202, 302, 302Tunnel, 452, 452Tunnel,
552
Safety and operating instructions
© Construction Tools PC AB | 9800 0648 01 | 2018-01-01
Original instructions
21
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