Service Manual
of WP12C Series Marine Diesel Engines
Warranty Explanation
1. Service promises
In the service region of Weichai Maintenance and Service Centre,
after received information from users and verifying that service is ne
eded, our maintenance team shall get to the place within 24 hours in
which the service centre is located, within 48 hours for city areas, and within
72 hours for remote areas.
( remote areas or force majeure factors excluded)
2. Special attention
● The engine operator must read the Operation and Maintenance
Manual carefully and abide by the operation rules in the Manual, and
pay attention to the warning directions and marks.
● The engine has been tested strictly in accordance with the test stip
ulations before delivery. The throttle has been sealed. It is forbidden to di
smantle the seal optionally and to enlarge the throttle. Otherwise, Weichai
will not be responsible for free repair.
● Some bolts of the engine are strictly specified for torque req
uirement and times of use. It is forbidden to loosen main bearing bolts and
connecting rod bolts. See Operation and Maintenance Manual for detail.
● Before using a new engine, a 50-hour commissioning should be
performed.
● After the engine is started from a cold state, do not increase the
engine speed suddenly, and do not run at idle speed for a long time.
● After the engine is stopped, if the ambient temperature was lower than
0°C and no antifreeze is used, the water in water tank and in diesel en
gine should be drained off.
● It is forbidden to operate the engine without a air cleaner and try to pr
event unfiltered air from entering into the cylinder. In severe working
conditions, clean or replace the air filter element more frequently, so
as to prevent early abrasion of engine.
● Applied fuel and lubricating oil must be in accordance with specified
grades and filtered by strainer, and a special clean container should be used.
The fuel should be settled for more than 72 hours.
3. The principle and stipulation of warranty service
● The principle of warranty Service
The engine purchased by users or fitted on other machinery, in case of
using and maintaining normally within the guarantee period, the damage or
trouble caused by manufacture and assembly etc. should be paid by our
company.
● Time limit of warranty service (shown in appendixtable)
(1) For the end product of our company, the starting date of warranty
period is in accordance with the date on our sales invoice, warranty card or
the formal invoice of the distributor (It should be within the 12-month oil seal
period of the engine).
(2) For the matching products, the starting date of guarantee period is in
accordance with the date on sales invoice or warranty card of the matched
product ( It should be within the 12-month oil seal period of the engine).
4.Following conditions are excluded by warranty
● Early wear and trouble arising from improper operation and mainten
ance, e.g.: damages from careless load and unload during transportation
the engine by users, operation conditions beyond the specified range in
the operation manual, over-speed or over-load operation; run-in, inspection,
adjustment and tightening not abiding by the operation manual, improper
match, usage of incorrect fuel, oil or antifreeze etc.
● Troubles arising from refitting, adjusting and disassembling the posi
tions and parts that are not allowed to adjust and disassemble casually
according to the product specification.
● Oil, antifreeze, filter element, hose and belt etc. for normal operation
and maintenance are not in the range of warranty service
● No warranty card or valid invoice, or no evidence that proves the pr
oduct is in warranty period.
● The specification and model of product in the guarantee card or inv
oice differs from that of the requested product for three guarantees, or the
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card and invoice was altered.
● Instead of maintaining the original damaged situation after trouble
occurs, user treats the trouble presumptuously and the reason or
trouble can not be verified.
Service Manual
of WP12C Series Marine Diesel Engines
Summary of Contents for WP12C350
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