Operation Manual

Job Card No.:
Engine:
Filing No.:
Starting Valve
Inspection
0178-31-10 1606
© 0983
01.11.01
S/BVM 628
Fig. 1
Fig. 2
Inspection
Check valve for free movement and freedom from
leaks.
If the starting air pipe gets hot at the cylinder
head when the engine is running, this sug-
geststhat the associated starting valve is lea-
ky.
Job:
Observe safety precautions (job 02.00.01).
Checking Valve Stem and Guide Piston from Free
Movement
Unscrew banjo bolt (58) - Fig. 1 -and press down
valve (1) with an arbor. If there is lack of free move-
ment, remove valve and overhaul (Job Card
01.11.02).
Checking the Valve for Tightnes
Remove banjo bolt (57) at starting air distributor (Fig.
2) and, in its place, fit a hex. bolt, sealing washers
(67) and a hex. nut to seal off the starting air line.
Turn the engine so that the respective piston is a
compression TDC (inlet and exhaust valves closed).
Place engine control lever in "Start" position and
slowly open shut-off valve on air receiver. If this
causes air to come out through the indicator valve,
this suggests that the starting valve is leaky.
However, before removing valve, check whether car-
bon deposits or valve binding are the cause of the
leak. To do this, unscrew banjo bolt (58) - Fig. 1 - at
the air pipe, remove sealing washers (66) and, after
unscrewing hex. bolt (10), take off lockwasher (11)
and cover (8). Apply a socket wrench to locknut (7)
and move valve to and fro to remove any carbon
deposizs. If this measure fails to eliminate the leak at
the valve seat, remove valve (Job Card 01.11.02).
Job Cards:
- 01.11.02
- 02.00.01
Tools:
- Standard tools
© 24 971 1
© 51 563 0