Testing Compression Pressure - Komatsu 114E-3 Series Shop Manual

30 Testing and adjusting

Testing compression pressure

a Testing tools for compression pressure
Symbol Part No.
1 795-799-6700 Injector puller
2 795-502-1590 Gauge assembly
D
3 795-790-6110
4 6754-11-3130
k
When measuring the compression pres-
sure, take care not to burn yourself on the
exhaust manifold, muffler, etc. or get
caught in a rotating part.
a Measure the compression pressure after the
engine is warmed up.
(Engine oil temperature: 40 – 60°C).
1. Disconnect breather tube (1) and blow-by tube
(2), and remove head cover assembly (3).
2. Disconnect injector harness connectors (4) (at
6 places) and move the harnesses.
3. Disconnect fuel high-pressure tube (5).
4. Loosen injector terminal nut (6) and remove
the terminal from the injector.
114E-3 Series
Part name
Adapter
Gasket
1
5. Move the cylinder to be tested to the compres-
sion top dead center.
a See "Adjusting valve clearance".
6. Remove rocker arm assembly (7).
7. Remove retainer (10) and disconnect fuel inlet
connector (11).
8. Remove holder (13).
9. Remove injector (14).
a Remove the injector using puller D1 and
the impact of slide hammer.
a Do not unclench the upper part of the
injector.
SEN00455-01
7