How To Inspect And Adjust The Spark Plug; How To Adjust The Tension On The Crawler Tracks - OREC AHRC 663 Operating Instructions Manual

How to inspect and adjust the spark plug

How to adjust the tension on the crawler tracks

New crawler track parts will stretch and become loose after a period of use, as they become
acquainted with the sprocket. If the crawler tracks are not adjusted to th e correct tension, they can
slip off during operation and their lifespan can decrease. Follow the steps below to adjust crawler
track tension.
Lock nut
b
Tension olt
A
1. Remove the spark plug with a plug wrench and clean away
any carbon deposits on the electrode (A) with a wire brush
and wipe away any moisture if present.
2. Replace the spark plug with a new one if the ceramic part
has cracked or the electrode have suffered extensive wear
and tear.
3. Please adjust the spark plug electrode clearanc e (B) to
0.028-0.031in (0.7-0.8mm).
 When attaching a spark plug onto the engine, screw by hand at
first before tightening with a plug wrench. If you start by using a
plug wrench to screw in the spark plug, there is a danger of
cross-threading it. (Refer to spark plug standards, page 33.)
Loosen the crawler track tensioning bolt's lock nut, located at the
1.
rear of the machine.
2. Turn the crawler track tensioning bolt to tighten it.
3. Adjust tension so that there is a clearance of 5/8in to 3/4 in along
line [A] when you push down on the crawler track .
4. Adjust the left and right crawler tracks so that equal tension is
placed on them.
5. Securely tighten the lock nut after adjusting.
 As there is an initial lengthening of new belts and
wires, please readjust after 2-3 hours of use.
 Check for strange noises and overheating when you
move the machine.
 Avoid strenuous work for the first 2-3 hours, to allow
all parts sufficient time to break-in.
 Please perform recommended maintenance and
periodic inspections after use.
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