Service Manual

WEICHAI EMISSION-RELATED INSTALLATION INSTRUCTIONS
OIL LEVEL GAUGE INSTALLATION
The WP04GNA Weichai engine comes equipped with the capability of using an oil level gauge. If a gauge
was purchased through Weichai America Corporation, the connector on the wiring harness and the
connector on the gauge should be a match. If the gauge was not supplied by Weichai America
Corporation, please contact our service department and the right connector can be purchased.
Figure 20: Oil Feed to Oil Level Gauge
To install the gauge, remove the 1” NPT plug from the oil pan shown in Error! Reference source not
found., and install a 1” NPT to ¾” barbed hose fitting. Use ¾” hose rated for oil to connect the gauge to
the fitting. If the gauge must be balanced according to the owner’s manual, an Oil Balance Line Kit can
be purchased from our service department. The kit includes one Oil Balance Line Block, four M6x1.0x35
bolts, two gaskets, one 1/8” NPT to 3/8” barbed fitting, one oil fill neck assembly and 3/8” hose at the
desired length. Remove the oil cap, sandwich the Oil Balance Line Block with provided gaskets, place
the oil fill neck assembly on top of the gasket and thread provided bolts into the four holes. Ensure the
fill neck is pointing at the 3 o’clock position so that it does not hit the exhaust manifold, and oil poured
into the filler neck will drain into the engine and not on the ground. Torque bolts to 9 Nm. See Error!
Reference source not found. for reference.
When running the balance line from the oil level gauge to the Oil Balance Line Block, ensure there are no
peaks or valleys. The line must gradually increase from the gauge to the block.
Set the center of the gauge 1.75” from the bottom of the engine feet for the correct level during
operation.
3/4” NPT to 3/4” Barbed
3/4” Hose rated for Oil
1” NPT to 3/4” Barbed
3/8” NPT to 3/8” Barbed
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