Groundsmaster 4500 --D/4700--D Page 3 -- 21 Yanmar Diesel Engine
Coupler Removal (Fig. 17)
NOTE: The hydraulic pump assembly needs to be re-
moved from engine before coupler can be removed.
1. If engine is in machine, remove hydraulic pump as-
sembly (see Piston (Traction) Pump in the Service and
Repairs section of Chapter 4 -- Hydraulic System).
2. Remove flywheel plate and spring coupler from en-
gine using Figure 1 7 as a guide.
Coupler Installation (Fig. 17)
1. Position spring coupler to engine flywheel and align
mounting holes. Make sure that coupling hub is away
from engine flywheel (Fig. 18).
2. Secure coupler to flywheel with eight (8) cap screws
and hardened washers. Torque cap screws in a crossing
pattern from 29 to 33 ft--lb (40 to 44 N--m).
3. Position flywheel plate to engine. Make sure that
boss on plate is orientated down. Secure flywheel plate
with eight (8) cap screws (item 7) and hardened wash-
ers. Torque cap screws in a crossing pattern from 29 to
33ft--lb(40to44N--m).
4. If engine is in machine, install hydraulic pump as-
sembly (see Piston (Traction) Pump in the Service and
Repairs section of Chapter 4 -- Hydraulic System).
Figure 18
1. Coupler
2. Coupler hub
3. Engine flywheel
Engine Side Hydraulic
Pump Side
1
2
3
Yanmar
Diesel Engine
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