Long-Term Storage; Storing The Engine In A Non-Operable Condition For 3 Months Or More; Preparation For Storage; Maintenance During Storage - Mitsubishi S4S-DT Operation & Maintenance Manual

Chapter 9 LONG-TERM STORAGE

Long-term storage

The following describes how to store the engine in a non-operable condition for 3 months or more and in an opera-
ble condition for 3 months or more.
If the engine has been left unattended for 3 months or more, the internal engine parts can rust, and that may cause
damage to the engine.
When storing the engine for an extended period of time, be sure to follow the directions below.
Storing the engine in a non-operable condition
for 3 months or more

Preparation for storage

1. Drain the engine oil in-use, pour new oil.
2. Prepare a fuel mixture containing 50 % rust-preventive oil (NP-9), and fill the fuel tank with it.
3. Operate under non-load minimum engine speed for 5 to 10 minutes.
4. Immediately before stopping the engine, spray volatile corrosion inhibitor (VCI) through the inlet port to prevent
rust on the air intake system.
5. With the engine stopped, drain the fuel mixture from the fuel tank.
6. Apply rust-preventive oil (NP-3) liberally on the exposed sections of the machining.
7. Seal the air inlet, exhaust outlet, breather and other openings with an adhesive cloth tape.
8. Cover the entire engine.
Note: (a) Store the engine in a well-ventilated indoor area.
(b) It is not necessary to drain coolant since it contains LLC. (Add LLC to increase the concentration to between
30 to 60 %.)
(c) Post a sign at an easily noticeable place to warn that the rust-preventive oil in the engine must be replaced
with engine oil, and the fuel tank must be filled with fuel before operating the engine for the first time after
storage.
(d) New engine oil can substitute for rust-preventive oil (NP-10-2) of lubrication system.
Recommended rust-preventive oil and corrosion inhibitor
K 2246
Z 1519

Maintenance during storage

Charge the battery once a month. First, check the battery electrolyte for proper level and then charge the battery.
Table 9-1 Recommended rust-preventive oil and corrosion inhibitor
JIS No. Recommended product
Nippon Oil Corporation
NP-3
Anti Rust P-1600
Nippon Oil Corporation
NP-9
Anti Rust P-2400
NP- Nippon Oil Corporation
10-2 Anti Rust P-230
Ryoukou Kagaku
- VCI Diana ND volatile corrosion
inhibitor
Application
Prevention of rust on
exposed machine sur-
faces
Prevention of rust in fuel
system
Prevention of rust in
lubricating system
Prevention of rust in air
intake system
9-1