Operation Manual

Table Of Contents

Job Card No.:

Engine:

Filing No.:

Valve Rotator Inspection

0178-11-10 1797

01.03.01

S/BVM 628

Inspection

Every 250 hours check while engine is running that

exhaust valves rotators move freely.

Job:

Unscrew plug (1) and O-seal (2) from rocker chamber

cover (3). Check with lamp that rotator (4) moves

freely: at 700/min engine speed check time needed

for a full revolution by watching cam (5). If this time is

more than 40 seconds, replace rotator on the next

occasion since rotator will most likely be out of

function soon.

Where rotator fails to move at all, replace once

engine can be stopped.

For rotator reconditioning see job 01.03.02. If O-seal

(2) is defective, replace.

Screw plug with O-seal into rocker chamber cover

and tighten moderately.

Tools:

- Standard tools,

- Lamp,

- Clock