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Parts Manual for
HYDRO DRIVE ZTR 42" & 50"
AUSTRALIAN
150Z SERIES
MODEL
SC2142 (7800390)
SC2450 (7800391)
Briggs & Stratton Yard Power Products Group
535 Macon Road
Manual No. 7006272
McDonough, GA, 30253 U.S.A.
800-935-2967
Revision IR, 10/6/2008 TP 400-5418-IR-HZ-N
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Table Of Contents PAGE GROUP Frame, Body & Seat Group 4 Transmission Group 8 Controls Group 12 16 Engine Group (21 H.P.) Engine Group (24 H.P.) 20 24 Wheel & Tire Group Decal Group 26 28 Mower Lift Group (42" Deck) Mower Lift Group (50" Deck) 30 32 42" Mower Deck - Clutch & Support Group 42" Mower Deck - Housing & Arbor Group 34 36 50" Mower Deck - Clutch & Support Group 50" Mower Deck - Housing & Arbor Group 38 42 Electrical Group Wiring Schematic 44 HYDRO DRIVE ZTR 42" & 50" Manual No. 7006272
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Manual No. 7006272 HYDRO DRIVE ZTR 42" & 50" TP 400-5418-IR-HZ-N 150Z SERIES 4
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Frame, Body & Seat Group Item Part No Qty Description Note 1 1733448A 2 WELDMENT, Caster Yoke & Spindle- Black 2 1960160 4 WASHER, .75 ID x 1.60 OD x .05 Thick Flat (Black) 3 1611710 2 KLIPRING, External for .750 Dia. Shaft 4 1734135 2 CAP, Hub 1.481 I.D. x .62 Long Red Poly 5 1730186 2 BUSHING, Axle Pivot PM Yellow 6 1733426A 1 AXLE, Front Iron Casting Machined ZT 7 1733571 2 SHOULDER BOLT, 3/8-16 x 3” Long .50 Sh GR5 Black 8 1960687 3 NUT, 3/8-16 Hex Flange Nyloc 9 2860744 1 SCREW, 5/8-11 x 3-
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Frame, Body & Seat Group Manual No. 7006272 HYDRO DRIVE ZTR 42" & 50" TP 400-5418-IR-HZ-N 150Z SERIES 6
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Frame, Body & Seat Group Item Part No Qty Description Note 37 1930594 6 SCREW, 1/4-20 x 3/4” Hex Flange Lock Black 38 7091591 4 BOLT, 5/16-18 x 1” Hex Flange Lock YZ 39 1728986 1 PAD, Footrest RH Black Vinyl w/Adhesive 40 1728987 1 PAD, Footrest LH Black Vinyl w/Adhesive 41 1960534 1 WASHER, .375 Flat (0.41 I.D. x 1.50 O.D. x .25 Thick) Black 42 1735680 1 TRIM, 8” 43 2820426 2 WASHER, 5/16” External Tooth Lock Washer, Yellow 44 1734392A 2 GUARD, Debris, ZTR - Black 45 1921221 1 SCREW, 5/16-18 x
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Transmission Group Manual No. 7006272 HYDRO DRIVE ZTR 42" & 50" TP 400-5418-IR-HZ-N 150Z SERIES 8
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Transmission Group Item Part No Qty Description Note 1 1960223 2 BOLT, 5/16-18 x 1-1/4” Round Head Short Square Neck GR5, Black 2 1919381 4 WASHER, 5/16” Flat (.341 I.D. x 1.00 O.D. x .13 Thick) Black 3 1703900 2 SPACER, .323 I.D. x .500 O.D. x 0.270 Long Heat Treated 4 1960684 2 NUT, 5/16-18 Hex Keps Conical Washer, Black 5 1727555 1 ROD, Control, LH (.500 Dia. X 27.88 Long) 6 1727556 1 ROD, Control, RH (.500 Dia. X 27.88 Long) 7 1727831 2 SHOULDER BOLT, 7/16-14 x 1.07 Long, GR5 8 1930650 6 NU
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Transmission Group Manual No. 7006272 HYDRO DRIVE ZTR 42" & 50" TP 400-5418-IR-HZ-N 150Z SERIES 10
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Transmission Group Item Part No Qty Description Note 40 1721133 1 PULLEY, Idler 41 1924940 2 WASHER, .375 Flat (.41 I.D. x .87 O.D.) 42 1708352A 1 BELT GUIDE 43 1923701 1 SCREW, 3/8-16 x 2” Hex Head Cap, GR5 43 7091553 1 SCREW, 3/8-16 x 1-3/4” Hex Head Cap, GR5 44 1931942 1 NUT, Push Pal, 3/8” 45 1960759 1 NUT, Push Pal, 1/2” 46 1933988 2 NUT, Push Pal .312 Dia. Thread .625 O.D. Black 47 1728073 2 PULLEY, 4-1/2” Transmission 48 1728074 2 FAN, 6” Transmission 49 1728075 1 BRAKE ARM & PIN, Hydro-
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Controls Group Manual No. 7006272 HYDRO DRIVE ZTR 42" & 50" TP 400-5418-IR-HZ-N 150Z SERIES 12
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Controls Group Item Part No Qty Description Note 1 1726410 2 GRIP, Foam Handle Bar 2 1727796A 2 TUBE, Handle 3 1960686 10 NUT, 5/16-18 Hex Flange Nyloc 4 1720452 2 CLAMP, Tube, Saddle 5 1919381 6 WASHER, 5/16” Flat (.341 I.D. x 1.00 O.D. x .13 Thick) Black 6 1960086 4 SCREW, 5/16-18 x 7/8” Truss Head Torx, Black 7 1917356 4 LOCKWASHER, Spring 5/16” - Black 8 1727926A 1 BRACKET, Tube Mount LH 9 1727927A 1 BRACKET, Tube Mount RH 10 1931338 4 BOLT, 5/16-18 x 1-3/4” Round Head Short Square Neck, GR5
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Controls Group Manual No. 7006272 HYDRO DRIVE ZTR 42" & 50" TP 400-5418-IR-HZ-N 150Z SERIES 14
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Controls Group Item Part No Qty Description Note 38 1666697 4 SPACER, Powdered Metal 39 1921977 5 SCREW, 5/16-18 x 1-1/4” Hex Head Cap, GR5, Black 40 1715025 4 BUSHING 41 1919438 4 NUT, 5/16-18 Hex Lock Esna Light 42 1727603A 2 WELDMENT, Pivot Control 43 1921221 4 SCREW, 5/16-18 x 1-1/2” Hex Head Cap, GR5, Black 44 1727918 2 SHOCK ABSORBER 45 1703805 2 RING, Klipring Extension (for .500 Dia. Shaft) 46 1725927 1 SHAFT, Cross Footnotes: HYDRO DRIVE ZTR 42" & 50" Manual No. 7006272 150Z SERIES TP
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Engine Group (21 H.P.) Manual No. 7006272 HYDRO DRIVE ZTR 42" & 50" TP 400-5418-IR-HZ-N 150Z SERIES 16
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Engine Group (21 H.P.) Item Part No Qty Description Note 1 -- 1 * ENGINE, 21 HP, B&S, ELS AUSTRALIA, Mod. 33M777-0114- B1 2 7300919A 1 HEAT SHIELD, Inner 3 1936228 2 SCREW, 5/16-18 x 3/4” Hex Head Cap, GR8 4 1917356 2 LOCKWASHER, Spring 5/16”, Black 5 1732259 1 WELDMENT, Exhaust Pipe 6 1731214 1 GASKET, Exhaust B&S 7 1960295 4 SCREW, 1/4-20 x 5/8” Hex Whiz Lock Flange 8 1927557 4 NUT, 5/16-18 Hex Flange Lock Large Black 9 1667812 1 SPACER (.390 x .900 x .70) YZ 10 1732255 1 BRACKET, Muffler/Heat
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Engine Group (21 H.P.) Manual No. 7006272 HYDRO DRIVE ZTR 42" & 50" TP 400-5418-IR-HZ-N 150Z SERIES 18
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Engine Group (21 H.P.) Item Part No Qty Description Note 42 1921332 2 SCREW, 5/16-18 x 3/4” Hex Head Cap, Black 43 7100416 1 CABLE, Choke, 54” 44 7090390 1 WASHER, 3/8” Internal Tooth Lock 45 7091630 1 NUT, 3/8-24 Hex 46 7075449 1 CONTROL, Throttle B&S Intek 47 7090999 2 SCREW, 1/4-20 x 5/8” Pan Head Taptite Torx 48 7091195 1 SCREW, #10-16 x 3/4” Pan Head Taptite Combo 49 7100529 1 KNOB, Throttle, Red 50 1734995 1 ** HOSE, Fuel, Low Perm, 1/4” I.D. x 19-1/2” Long 51 7012222 2 CLAMP, Fuel Hose Fo
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Engine Group (24 H.P.) Manual No. 7006272 HYDRO DRIVE ZTR 42" & 50" TP 400-5418-IR-HZ-N 150Z SERIES 20
