JLG 450A_AJ Series II Service Manual - Manual (Page 27)

SECTION 1 - SPECIFICATIONS
3121259 – JLG Lift – 1-11
21. Fuel Filter (Propane) - GM Engine
Interval - 3 Months or 150 hours of operation
Comments - Replace filter. Refer to Propane Fuel Filter
Replacement.
1.12 DRAINING PROPANE REGULATOR OIL
BUILD UP (PRIOR TO S/N 0300137808)
Operation oils may build in propane pressure regulator
primary and secondary chambers during normal use.
These oils are caused by poor fuel quality, fuel supply
chain contamination, or regional variation in fuel make
up. Significant oil buildup can effect fuel control system
operation. Refer to Section 1.11, Operator Mainte-
nance for maintenance intervals. More frequent drain-
ing may be required if fuel supply is contaminated.
NOTE: Warm engine to operating temperature before drain-
ing For best results. this will allow oils to flow freely
from regulator.
1. Move equipment to a well ventilated area. Ensure
there are no external ignition sources.
2. Start engine and bring to operating temperature.
3. With engine running, close manual tank valve and
run engine out of fuel.
4. Push Emergency Stop when engine stops.
5. Disconnect electrical connection to LPG fuel tem-
perature sensor in auxiliary fuel port of the EPR.
6. Remove LPG fuel temperature sensor retainer clip
and sensor from regulator body.
NOTE: Have a small container ready to collect oil that drains
freely from regulator.
7. Drain all oil. Reinstall LPG fuel temperature sensor
and reconnect electrical connector.
8. Open fuel tank manual valve.
9. Pull out Emergency Stop and start engine. Verify all
connections are secure.
10. Dispose of any drained oil per local regulations in a
safe and proper fashion.