Filter
Top Products
3-28 DISASSEMBLY, REASSEMBLY, INSPECTION, AND MAINTENANCE
Valve System
Hydraulic Lash Adjuster (HLA)
The FE350 and 400 are equipped with a Hydraulic Lash Adjuster
(HLA) to automatically adjust the valve train to zero clearance through
hydraulic means.
Purpose of the HLA
The HLA hydraulically adjusts the valve train to zero clearance by
automatically absorbing the changes in the clearance that are created
through thermal expansion or wear. The purpose of the HLA is to
eliminate the need to adjust the clearance of the valve train, reduce
the noise generated by the valve train, and stabilize the performance of
the engine.
HLA Position and Oil Supply Path
The HLA needs the pressurized oil from the oil pump. The diagram
shows the position in which the HLA is installed and the oil supply path.