Yanmar 4LHA-STP User Manual

Chapter 3 Fuel Injection Equipment
3. Disassembly, Reassembly and Inspection of Fuel Injection Pump
4LHA Serie
(4) Turn the camshaft and push the roller guide
support pin into the hole on the stopper groove of
the roller gu ide.
fl
NOTE: If the camshaft does not turn, put double
nuts or a coupling on the end of camshaft.
Roller guide
support pin
NOTE: 1. Be careful not to damage the oil seal with
the threaded part of the camshaft.
2. Be careful not to lose the shims between
the pump and bearing holder.
(8) Put a plate against the governor end side of the
camshaft and tap it lightly. Pull out the camshaft
and drive side bearing.
(5) Remove the camshaft woodruff key.
(6) Remove the 4 bolts of the bearing holder.
(7) Place a screwdriver in the two grooves on the
camshaft bearing holder mounting surface, and
pull out the camshaft bearing holder.
3-2-23

Yanmar 4LHA-STP Specifications

General

Number of Cylinders	4
Fuel System	Direct Injection
Engine Type	4-Stroke Vertical Water-Cooled Diesel Engine
Displacement	3.455 L
Bore x Stroke	100 mm x 110 mm
Aspiration	Turbocharged