Compression Relief; Inspection - DeWalt DW168F Manual

Compression relief

Y9. Camshaft
C10. Reducer pin
E10. Flying block
D10. Matching block
F10. Flying block pin
REassEMBly
Timing Gear
Use the old gear as reference and make a mark at the same position on the new gear.
Use a hydraulic press, driver and attachment I. D. (special tool) to press the new gear onto
the crankshaft.
Dw168
Driver 40 mm I.D. 07746 – 0030100
Attachment, 07746 – 0030200
25 mm I.D.
Dw177 and Dw188
Driver 40 mm I.D. 07746 – 0030100
Attachment, 07746 – 0030300
30 mm I.D.
Governor Drive Gear
Use a hydraulic press, driver and attachment I. D. (special tool) to press the new governor
drive gear onto the crankshaft.
Dw168
Driver 40 mm I.D. 07746 – 0030100
Attachment, 07746 – 0030300
30 mm I.D.
Dw177 and Dw188
Driver 40 mm I.D. 07746 – 0030100
Attachment, 07746 – 0030400
35 mm I.D.
Y9
f10
C10
D10
E10
Crankshaft Bearing
Use a hydraulic press and driver with a diameter
larger than crankcase cover (X8) opening to
press the new bearing (W9) onto the crank-
shaft.
Timing Mark alignment
noTE: Balancer gear equipped on DW188F engines only, for DW168F and DW177F
engines proceed to step 2.
1. With crankshaft (X9) installed in crankcase install balancer (A10). noTE: Align marks
on balancer and balancer drive gear of crankshaft.
2. Install the camshaft aligning marks on camshaft (Y9) with those on timing gear of
crankshaft.
Y9
X9
ALIGN mARKS
Dw168f, Dw177f

Inspection

oIl lEVEl sWITCh (DW177, DW188)
1. With the switch in the normal upright orientation test the continuity between the yellow
lead and the face of the brass ground connector as show. The ohm meter should read
approximately zero resistance.
2. Hold the switch upside down to simulate the float's position in the crankcase when it is
filled with oil. Test the continuity in the same way between the face of the brass ground
connector and the yellow lead. The ohm meter should read approximately infinite
resistance.
3. If either test yields an incorrect reading replace the low oil shutdown unit.
48
DRIVER
X8
w9
Y9
X9
X10
ALIGN mARKS
Dw188f