Section 4 maintenance, 1. crankcase oil, A. oil check – MTD 1850 User Manual
Page 11: 2. chain case lubrication, Note, 3. chain adjustment, Figure 4-1. oil fill plug, B. oil change, 4. air filter
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SECTION 4
MAINTENANCE
4-1. CRANKCASE OIL
To
ensure
maximum
engine
performance,
perform
the following periodic maintenance:
a. Oil Check
Check the oil level in the crankcase before each use
of the machine and after every two hours of opration.
The oil level shall be over-flowing at the oil fill plug.
See figure 4-1.
OIL FILL PLUG
OIL DRAIN
Step 1. With the machine on level ground, place a
suitable metal container under the oil drain
plug, then remove the drain plug.
Step 2. After the oil has been drained completely
from the crankcase, replace the drain plug
and tighten.
Step 3. Refill crankcase with 2% pints of SAE 30 en
gine oil (A.P.I. class MS). Pour the oil slowly
to eliminate airlock.
4-2. CHAIN CASE LUBRICATION
The
chain
is
permanently
lubricated
and
requires
no further lubrication unless the case is disassembled
for repair.
If the case is disassembled, clean the chain with
kerosene, allow it to dry and work a high temperature
grease, such as Lubriplate No. 310 into the chain.
NOTE
A 4 oz container of Lubriplate No. 310
is
available
under
part
number
727-136.
4-3. CHAIN ADJUSTMENT
No chain adjustment is necessary.
FIGURE 4-1. OIL FILL PLUG
b. Oil Change
After the first two hours of operating a new engine,
drain the oil (see figure 4-2) from the crankcase while
engine
is
still hot
and
refill
crankcase with new
oil;
thereafter change the oil after every 25 hours of opera
tion. This procedure ensures for minimum wear of en-
gin
parts
and
provides
for
virtually
trouble-free
oper
ation. To change the oil, proceed as follows:
4-4. AIR FILTER
Under
normal
operating
conditions,
the
air
cleaner,
located
on
top
of
the
carburetor,
must
be
serviced
after
every
ten
hours
of use.
Under extremely
dusty
operating
conditions, the air cleaner must be serviced
after every hour of operation. See Figure 4-3.
Step 1. Remove the wing nut and cover.
Step 2. Lift off foam element from support base.
Step 3. Remove metal support tube assembly (screen
and two metal caps) from foam element by
compressing the foam element.
4-1