Maintenance
SY35U Excavator OMM
5-38
Operation and Maintenance Manual — 0120
SANY
Inspect Engine Crankcase Breather System
The crankcase breather system is required to be inspected every 1500 hours to maintain the emission requirements
of the engine.
The crankcase breather system has a spring-backed
diaphragm in the valve cover. When the crankcase pressure
reaches a predetermined level, the diaphragm opens a
passage that allows crankcase fumes to be routed to the
intake manifold.
To inspect the diaphragm and spring:
1. Prepare the machine for service. See “Maintenance
2. Remove the fasteners and diaphragm cover (1).
3. Remove the spring (2), diaphragm plate (3), and
diaphragm (4).
4. Inspect the diaphragm for damage and the spring for
distortion. Replace components if necessary.
5. Install the diaphragm, diaphragm plate, spring and diaphragm cover. Tighten the fasteners.
Fig. 5-35
0005030
1
2
3
4
