Piston Cooling Nozzle Spray Positioning - Mack E7 Service Manual

5-101.bk Page 15 Friday, March 17, 2006 11:05 AM
Piston Cooling Nozzle Spray
Positioning
Refer to Figure 6-16.
The piston cooling oil spray location on the
underside of the piston is important; it ensures
adequate heat dissipation from the piston and
makes certain that the crankshaft counterweights
of the connecting rods do not strike the nozzles.
1. Old pattern (pre-1991)
200 ENGINE ASSEMBLY
1
Figure 6-16 — Spray Nozzle Patterns
Always replace a badly deformed spray nozzle.
Do not attempt to realign it. Precise targeting is
necessary to adequately cool the piston crown.
For ease of installation and to reduce the amount
of crankshaft rotation needed to facilitate access
to the spray nozzles, install the spray nozzles in
the following order: cylinders 1 and 6, 5 and 2, 3
and 4.
2
2. New pattern (1991 and later)
200277a
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