Checking Engine Speed - WACKER Group LTC 4 Repair Manual

LTC Repair Electrical Troubleshooting

7.12 Checking Engine Speed

See Graphic: wc_gr001625, wc_gr001634, and wc_gr002441
Using either a photo (strobe) tachometer, a frequency meter (60Hz =
1800 rpm; 50Hz = 1500 rpm), or a vibration tachometer such as a
Sirometer (a) (Wacker P/N 0053397), check engine rpm. Refer to the
instrument instructions. If necessary, adjust engine rpm using
adjusting screw [(b) Lombardini engines, (c) CAT engines]. No load
engine speed should be 1850 rpm for 60Hz and 1550 rpm for 50Hz
models.
CAUTION: Do not adjust the engine speed to be higher than that listed
above. The electrical components are frequency sensitive. Running at
higher speeds will lead to component damage.
Also check the condition of the engine air, fuel, and oil filters. Change
the filters if necessary. See maintenance section.
a a
b b
wc_gr001625
wc_gr001634
c
wc_gr002441
97
wc_tx000429gb.fm