User Manual

SENR9977 35
TestingandAdjustingSection
i02253244
Fuel Injectio n Timing - Check
Table 3
Required Tools
Part
Number
Part Description Qty
27610032
Timing Pin 1
1. Set the number one piston at top center on
the compression stroke. Refer to Testing and
Adjusting, “Finding Top Center Position for No. 1
Piston” for the correct procedure.
Note: Do not remove the timing pins after finding top
center on the compression stroke.
g011347 28
Illustration 43
(1) Hole for timing pin for the fuel pump
(2) Hole for c ams haft pin
(3) Hole for crankshaft pin
2. Insert the 27610032 Timing Pin through the hole
in the fuel pump gear and through the slot in the
hub. Push the timing pin fully into the hole in the
body of the fuel injection pump.
Note: The 27610032 Timing Pin must be a sliding fit
in the hole in the body of the fuel injection pump.
3. The timing of the fuel pump is correct when all
three of the timing pins are in the position.
Note: If the 27610032 T iming Pin cannot be pushed
into the body of the fuel injection pump, then the fuel
pump gear must be realigned on the hub on the fuel
injectionpumpshaft.RefertoTestingandAdjusting,
“Fuel Injection Timing - Adjust”.
4. Remove all three timing pins and install the
removed compon
ents.
i02243111
Fuel Quality - Test
Use the follow
ing procedure to test for problems
regarding fuel quality:
1. Determine if
water and/or contaminants are
present in the fuel. Check the water separator (if
equipped). If a water separator is not present,
proceed to St
ep 2. Drain the water separator, if
necessary. A full fuel tank minimizes the potential
for overnight condensation.
Note: A water separator can appear to be full of fuel
when the water separator is actually full of water.
2. Determine if contaminants are present in the
fuel. Remove a sample of fuel from the bottom
of the fuel t
ank. Visually inspect the fuel sample
for contaminants. The color of the fuel is not
necessarily an indication of fuel quality. However,
fuel that i
s black, brown, and/or similar to sludge
canbeanindicationofthegrowthofbacteriaor
oil contamination. In cold temperatures, cloudy
fuel indic
ates that the fuel may not be suitable for
operating conditions.
Refer to O
peration and Maintenance Manual,
“Refill Capacities and Recommendations” for
more information.
3. If fuel quality is still suspected as a possible
cause to problems regarding engine performance,
disconne
ct the fuel inlet line, and temporarily
operate the engine from a separate source of
fuel that is known to be good. This will determine
if the pr
oblem is caused by fuel quality. If fuel
quality is determined t o be the problem, drain the
fuel system and replace the fuel filters. Engine
perform
ance can be affected by the following
characteristics:
•
Cetane
number of the fuel
•
Air in the fuel
•
Other fuel characteristics