1-S31
ZD21N-EC, ZD21-EC, ZD28-EC, WSM
ENGINE
(B) Timing Gears, Fuel Camshaft and Camshaft
[D782-E-XFM5]
Injection Pump and Speed Control Plate
1. Remove the socket head screws and nuts, and remove the
injection pump (3).
2. Remove the screws and separate the speed control plate (2),
taking care not to damage the spring (4).
3. Disconnect the spring (4) and remove the speed control plate (2).
(When reassembling)
• Hook the spring (4) to the lever (5) first and install the speed
control plate (2).
• Be sure to place the copper washers underneath two screws (1)
(as shown in the figure).
• Position the slot (9) on the fork lever just under the slot (8) on the
crankcase.
• Insert the injection pump (3) so that the control rod (7) should be
pushed by the spring (6) at its end and the pin (10) on the rod
engages with the slot (9) on the fork lever (as shown in the
figure).
NOTE
■
• The sealant is applied to both sides of the soft metal gasket
shim. The liquid gasket is not required for assembling.
• Addition or reduction of shim (0.05 mm, 0.0020 in.) delays or
advances the injection timing by approx. 0.0087 rad (0.5
°
).
• In disassembling and replacing, be sure to use the same
number of new gasket shims with the same thickness.
W10167080
Fan Drive Pulley
1. Set the stopper to the flywheel.
2. Remove the fan drive pulley retaining screw.
3. Draw out the fan drive pulley with a puller.
(When reassembling)
• Install the pulley to the crankshaft, aligning the mark (1) on them.
• Apply engine oil to the fan drive pulley retaining screws.
And tighten them.
W10172470
(1) Screws and Copper Washers
(2) Speed Control Plate
(3) Injection Pump
(4) Spring
(5) Lever
(6) Spring
(7) Control Rod
(8) Slot (Crankcase Side)
(9) Slot (Fork Lever Side)
(10) Pin
Tightening torque
Fan drive pulley retaining
screw
117.6 to 127.4 N·m
12.0 to 13.0 kgf·m
86.8 to 94.0 ft-lbs
(1) Aligning Mark
KiSC issued 09, 2006 A
Summary of Contents for ZD21-EC
Page 1: ...ZD21N EC ZD21 EC ZD28 EC WORKSHOP MANUAL ZERO TURN MOWER KiSC issued 09 2006 A ...
Page 7: ...5 ZD21N EC ZD21 EC ZD28 EC WSM SAFETY INSTRUCTIONS KiSC issued 09 2006 A ...
Page 8: ...6 ZD21N EC ZD21 EC ZD28 EC WSM SAFETY INSTRUCTIONS KiSC issued 09 2006 A ...
Page 11: ...9 ZD21N EC ZD21 EC ZD28 EC WSM DIMENSIONS DIMENSIONS KiSC issued 09 2006 A ...
Page 12: ...G GENERAL KiSC issued 09 2006 A ...
Page 59: ...1 ENGINE KiSC issued 09 2006 A ...
Page 60: ...CONTENTS MECHANISM 1 FUEL SYSTEM 1 M1 1 GOVERNOR 1 M1 KiSC issued 09 2006 A ...
Page 138: ...2 TRANSAXLE KiSC issued 09 2006 A ...
Page 178: ...3 FRONT AXLE KiSC issued 09 2006 A ...
Page 179: ...CONTENTS MECHANISM 1 STRUCTURE 3 M1 KiSC issued 09 2006 A ...
Page 187: ...4 HYDRAULIC SYSTEM KiSC issued 09 2006 A ...
Page 202: ...5 ELECTRICAL SYSTEM KiSC issued 09 2006 A ...
Page 205: ...5 M2 ZD21N EC ZD21 EC ZD28 EC WSM ELECTRICAL SYSTEM ZD28 KiSC issued 09 2006 A ...
Page 206: ...5 M3 ZD21N EC ZD21 EC ZD28 EC WSM ELECTRICAL SYSTEM ZD21N ZD21 KiSC issued 09 2006 A ...
Page 207: ...5 M4 ZD21N EC ZD21 EC ZD28 EC WSM ELECTRICAL SYSTEM ZD28 KiSC issued 09 2006 A ...
Page 237: ...6 ROTARY MOWER KiSC issued 09 2006 A ...
Page 238: ...CONTENTS MECHANISM 1 POWER TRANSMISSION 6 M1 2 LIFTING MECHANISM 6 M2 KiSC issued 09 2006 A ...