Daedong DSC48 - Page 121

Apr. 2007
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DSC48
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B. TIMING GEARS AND CAMSHAFTS
► TIMING GEAR BACKLASH
1. Set a dial indicator's tip on the gear tooth.
2. Move the timing gear to measure the backlash, while
holding its mating gear.
3. If the backlash exceeds the allowable limit, check the
oil clearance of the shaft and gear.
4. If the oil clearance is excessive, replace the gear.
(1) Idle gear collar 2 (3) Idle gear collar 1
(2) Idle gear
► CAM GEAR SIDE CLEARANCE
1. Pull the cam gear with the camshaft (1) to its ends.
2. Measure the clearance A between the cam gear (2) and
camshaft stopper (3).
3. If the clearance exceeds the allowable limit, replace the
camshaft stopper (3).
(1) Camshaft (3) Stopper
(2) Cam gear
► IDLE GEAR SIDE CLEARANCE
1. Pull the idle gear collar 2's end (1), while pushing the
idle gear's end (2).
2. Measure the clearance A between the idle gear and idle
gear collar 2 with a feeler gauge.
3. If the clearance exceeds the allowable limit, replace the
idle gear collar 1 (3).
Factory spec. Allowable limit
0.04 ~ 0.11 mm
0.002 ~ 0.004 in.
0.15 mm
0.006 in.
Factory spec. Allowable limit
0.20 ~ 0.51 mm
0.008 ~ 0.020 in.
0.9 mm
0.035 in.
Factory spec. Allowable limit
0.07 ~ 0.22 mm
0.003 ~ 0.009 in.
0.3 mm
0.012 in.