Mincon Rockdrills 6DH360, Operation & Service Manual

Page: 9 / 10

Mincon Rockdrills – “The Driller’s Choice” Page 9
4.2 Hammer Service Log
WEARSLEEVE / PISTON CLEARANCE
Part New Dimension As Measured Wear Actual Clearance Discard
Clearance
Wearsleeve A 4.560” (115.83mm) C C-A
C-D
≥
0.010”
(0.25mm)
Piston OD B 4.555” (115.70mm) D B-D
INNER CYLINDER / PISTON CLEARANCE
Part New Dimension As Measured Wear Actual Clearance Discard
Clearance
Cylinder ID A 3.977” (101.03mm) C C-A
C-D
≥
0.010”
(0.25mm)
Piston OD B 3.972” (100.90mm) D B-D
DISTRIBUTOR PROBE / PISTON ID CLEARANCE
Part New Dimension As Measured Wear Actual Clearance Discard
Clearance
Distributor Probe OD A 1.326” (33.70mm) C C-A
C-D
≥
0.010”
(0.25mm)
Piston ID B 1.334” (33.90mm) D B-D
ALIGNER / BIT BEARING CLEARANCE
Part New Dimension As Measured Replace dimension
Aligner ID (Unscalloped
End) A 3.439” (87.35mm) B
3.444” (87.48mm)
Bit Bearing Surface OD
3.435
±
0.002”
(87.25±0.05mm)
Note: The head of the bit should wear out before the bearing
surface does
EXTERNAL WEAR
Description Wear Limit As Measured
Wearsleeve Reverse Dimension: 5.310”( 135.00mm)
Wearsleeve Discard Dimension: 5.060” (128.50mm)
Note 1: If no evidence of significant air pressure drop or if wearsleeve is wearing evenly on the top and bottom end, recommendation is to not
reverse wearsleeve.
Note 2: Chuck should be replaced when wear transfers to wearsleeve.
Chuck end
D
D
C
C
D
C
Scalloped end
C