Adjusting Engine Speed; Engine Air Cleaner; Engine Crankcase Breather; Engine Speed Adjustment - Carrier DM-4 Power Pack Operation And Service Manual

4.3.4 Adjusting Engine Speed

Refer to section 1.2 for correct engine speed.
To Check Engine Speed:
With the engine stopped, place a mark (white paint for
example) on the crankshaft sheave. Start engine and verify
engine speed by using a Strobette-model 964 (Strobe-
tachometer), Carrier Transicold Part No. 07-00206.
To Increase Speed:
Loosen jam nut "B." Turn capscrew "B" clockwise
until correct speed is achieved, then tighten jam nut "B"
and check engine speed (see Figure 4-2).
To Decrease Speed:
Loosen jam nut "B." Turn capscrew "B" counter-
clockwise until correct speed is achieved, then tighten jam
nut "B" and check engine speed (see Figure 4-2).
1. Speed Lever
2. Jam Nut "B"
3. Capscrew "B"
Figure 4-2. Engine Speed Adjustment

4.3.5 Engine Air Cleaner

a. Inspection
The dry type air cleaner should be inspected regularly
for leaks. A damaged air cleaner or hose can seriously af-
fect the performance and life of the engine. The air clean-
er is designed to effectively remove contaminants from the
air stream entering the engine. An excessive accumulation
of these contaminants in the air cleaner will impair its op-
eration, therefore, a service must be set up and followed.
Remember that the air cleaner cleans the air, but the air
cleaner requires cleaning. The following simple service
steps are easily made while the engine is being serviced.
1. Check all connections for mechanical tightness. Be
sure air cleaner outlet pipe is not fractured.
2. In case of leakage and if adjustment does not correct
the problem, replace necessary parts or gaskets. Swelled or
distorted gaskets must always be replaced.

4.3.6 Engine crankcase breather

1
The engine uses a closed type breather with the breath-
er line attached to the cylinder head cover. The breather
assembly should be cleaned once a year or at every 3000
hour maintenance interval (which ever comes first).
2
3
1. Cylinder Head Cover
2. Breather Cover
3. Breather Element
4. Plate
4-3
2
3
4
5
6
5. Breather Oil Shield
6. Bolt
7. Breather Assembly
8. O-Ring
Figure 4-3. Engine Crankcase Breather
7
8
1