Yanmar 4LHA-HTP Operation Manual page 564

Chapter 7 Reduction and Reversing Gear
5. Disassembly
4LHA Serie.
(4)Remove the shift lever to the anti-shift lever side
5-6 Disassembling the shifting device
(l)Take out the shifter and shifter spring.
(5) Remove the oil-seal and O-ring.
(2)Remove the stopper bolt of the shifter and shim.
Oil seal
(3)Loosen the belt of the shift lever and remove the
shift lever and cable bracket.
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