Weifang 495 - Test Running and Running-In

. .
Chapte~ N. Test Running and Running--in of The Engine
. Though the new and the overhauled engines had been tested
running in the factory before'delivery, the working surfaces of the
~ .
engine parts still have not won the I?erfect fitness; therefore, it is
forbidde.n
to let the engine· parts run under ·full load right away;
. .
otherwise·, the parts will wear rapidly and the engine. service life
becomes much shorter.
Th·e duration of the. test working a~d running ~ in.:period
should not be less than 50 hours. It is recommended to adopt the
following procedure:
, .. .
1. No -load running (for 15 minutes) ,referred to Table 3
Table 3
Speed (rpm)
800-1000
1400-1600 1800-2000
Time durationCmin)
5
5
5
(1 ) Start the engine according to the procedures stipulated in
this .manual.
(2) During the engine in no -load running, 0 bserve the opera t-
ing condition and listen to the noises carefully of all engine parts.
The engine is allowed to run - in under load only if the engine is
normal for sure in its test working.
2. Loaded running-in (for 50 hours) ,referred to Table 4
Table 4
Speed
Perce~tage of Load
Duration
No
full load ( %)
(rpm)
(PS)
(hr)
1
2000
25
12
10
2
2000
50
24
15
3
2000
75
36
20
4
2000
100
48
5
(1) If the actual load of the driven equipment is difficult to be
83