Drive Belt Check, Stretching And Replacement; Operating Manual L - LIMBACH L 2000 EA Operating And Maintenance Manual

Velvet black:

Electrode gap too big

Mixture too rich

Lack of air (induction air filter contaminated)

Engine does not reach required temperature
Oillike glossy:

Interrupted spark plug operation

Excess oil in combustion chamber

Cylinder or piston rings worn out
Pearl formation:

Wrong spark plug

Loose spark plug

Mixture too lean ("false air")

Valves do not close properly

Induction air temperature too high (carburetor shielding defective)

8.15 Drive Belt check, stretching and replacement

Drive belt check.
Check for wear, cracks and oil traces.
Drive belt tension check.
It must be possible to push the drive belt through with a strong thumb
load by 5 to 10 mm.
Stretching of drive belt.
Unfasten mounting bolt of clamp at the crankcase or accessory housing. Unfasten
mounting nut of alternator with locking at the clamp. Stretch drive belt by moving the
alternator. Tighten and lock all bolts and nuts.
Replacement of drive belt.
Front-mounted alternator:
Mark position of propeller relative to starter ring gear and remove propeller.
Unfasten mounting bolts of clamp and detach drive belt from the belt pulley of the alternator.
Demount starter gear and remove drive belt.
Place new drive belt to starter gear and mount starter gear. Ignition timing markings at
starter ring gear and propeller hub must be in coincidence.
Place drive belt to alternator belt pulley and stretch drive belt. Lock mounting screws.
Install propeller.
Check propeller blade track.
Caution:
After propeller installation airworthiness inspection is mandatory.
Edition: 01.03.2016

Operating Manual L 2000

Page: 35/48