Safety and operating instructions
© Construction Tools PC AB | 9800 1594 01 | 2020-03-23
Original Instructions
21
The wear bushing must be replaced when the inner
diameter(A) has reached its maximum wear limit,
see section "Wear limits" and "Replacing the working
tool bushing".
n
Check the working tool for wear.
The working tool must be replaced when the outer di-
ameter(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.
n
Check the breaker and the adapter plate for cracks
and wear.
n
Check that the accumulator screws are properly tight-
ened. The correct tightening torque is found in the
spare parts list.
NOTICE The working tool must never be sharpened by
forging. Sharpening must only be performed by milling,
grinding, or turning.
7.6.1 Wear limits
A, mm (in.) B, mm (in.)
EC 40T 45 (1.77) 39 (1.54)
EC 50T 55 (2.17) 49 (1.93)
EC 60T 65 (2.56) 59 (2.32)
EC 70T 73 (2.87) 67 (2.64)
EC 80T 83 (3.27) 77 (3.03)
7.6.2 Replacing the wear bushing
The wear bushing is kept in place by the retainer pin. A
new wear bushing has a slip fit.
1.
If a worn out wear bushing is stuck, use a sliding
hammer to remove it.
2.
Carefully clean the bore and the wear bushing seat
area.
3.
Lubricate and mount the wear bushing.
4.
Use a plastic sledgehammer to insert the wear bush-
ing.
5.
Keep the wear bushing in position with help of the re-
tainer pin.
7.7 Every year
Overhauling must be done after one year of continuous
operation. Overhauling must for safety reasons be per-
formed by authorised personnel at an authorised work-
shop.
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