Husqvarna Z4218 User manual

English
Parts Manual
Z4218 / 968999281 Z5426 / 968999508
Z4219 / 968999511 Z4824 / 968999512
Z4220 / 968999655 Z4619 / 968999656
Z4824BF / 968999517 Z4220BF / 968999685
Z4219BF / 968999763 Z4619BF / 968999764
Z5426BF / 968999765
Please read the operator’s manual carefully and make sure you
understand the instructions before using the machine.

When you need spare parts or support in service questions, warranty issues, etc., please consult the following
professional:
Manufacturing Number
Stated on the plate, from the top are:
The machine’s type designation (I.D.).•
The manufacturer’s type number (Model).•
The machine’s serial number (Serial no.)•
Please have the type designation and serial number available when ordering spare parts.
The engine’s manufacturing number is stamped on one of the valve covers.
The plate states:
The engine’s model.•
The engine’s type.•
Code•
Please have these available when ordering spare parts.
Thewheelmotorsandhydrostaticpumpshaveabarcodedecalafxedattherear.
MODEL
I.D.
SERIALNO
401NCOMMERCESTREET
BEATRICENE68310U.S.A.
MADEINU.S.A.
©2008HTC All Rights Reserved.
Beatrice, NE. Printed in U.S.A.
This Parts Manual belongs to the machine with the
manufacturing number: Engine Transmission
The machine’s manufacturing number can be
found on the printed plate afxed to the engine
compartment. Illustration at left shown with engine
removed.

CONTENTS
NOTE: ALL FASTENERS ARE GRADE 5 UNLESS OTHERWISE SPECIFIED.
CHASSIS / FRAME.....................................................4
ForUnitsWithSerialNumberBefore0752xxxxx ...4
For Units with Serial Number After 0752XXXXX ....6
ENGINE.......................................................................8
Kohler 18 HP...........................................................8
Kohler 20 HP.........................................................10
Briggs & Stratton 16 HP........................................12
Briggs & Stratton 24 & 26 HP...............................16
STEERING................................................................18
IGNITION SYSTEM...................................................20
HYDRAULIC PUMP-MOTOR....................................24
WHEELS AND TIRES ...............................................26
MOWER LIFT / DECK LIFT.......................................28
Model 968999508, 968999765.............................30
42" CUTTING DECK.................................................32
46" CUTTING DECK.................................................34
48" CUTTING DECK.................................................36
54" CUTTING DECK.................................................38
SEAT .........................................................................40
ForUnitsWithSerialNumberBefore0752xxxxx .40
ForUnitsWithSerialNumberAfter0752xxxxx.....42
DECALS....................................................................44
ACCESSORIES.........................................................46
UtilityBox-Model968999655..............................46
ACCESSORIES.........................................................47
SCHEMATIC..............................................................48
ForUnitsWithSerialNumberBefore0752xxxxx .48
ForUnitsWithSerialNumberAfter0752xxxxx.....49

4
CHASSIS / FRAME
1
2
4
5
7
9
10
13
12 37
3
15
14
18
8
6
11
1
17
26
26
3
28
19
20
21
22
25
24
25
26
26
27
17 31 16
16
16
23
29
30
32
33
34
35
36
38
39
40
17
41
42
43
44
44
47
46
45
48
49
50
17
ForUnitsWithSerialNumberBefore0752xxxxx
51
26 52

5
ITEM PART NO. QTY. DESCRIPTION ITEM PART NO. QTY. DESCRIPTION
539 1010801.. ....3 ....SWITCH-INTERLOCK
539 1011512.. ....2 ....RING-RETAINING EXT, 7/8
539 1026783.. ....3 ....SCREW PLATE, #10-24
539 1052454.. ....1 ....GROMMET, RUBBER
539 1061885.. ....1 ....FUEL CAP, ANTISPLASH
539 1095526.. ....4 ....LOCKWASHER, 3/16
539 1103777.. ....1 ....CHASSIS W/DECALS
539 1330378.. ....1 ....CONSOLE W/DECALS
539 1102529.. ....1 ....FUEL TANK
539 11028410.. ....1 ....FOOT REST
539 11029411.. ....2 ....WASHER, 7/8, WAVE
539 11031012.. ....1 ....SLIP, MATTING
539 11043213.. ....1 ....STEM, FUEL TANK
539 11086014.. ....2 ....SWITCH BRACKET
539 92378715.. ....4 ....BUSHING
539 97695216.. ....6 ....SCREW,#10-24x5/8
539 99071717.. ..11 ....NUT, 5/16-18, NYLOC
539 10123118.. ....1 ....SPINDLE-IDLER
539 10133119.. ....1 ....NUT, ½-13, NYLOC
539 10133220.. ....1 ....HCS,½-13x2¾
539 10171421.. ....1 ....SOLENOID
539 10197722.. ....1 ....SPRING
539 10258723.. ....3 ....GROMMET, BUMPER
539 10275924.. ....3 ....INSULATOR-BATTERY
539 10711625.. ....2 ....GROMMET
539 10747526.. ..33 ....BOLT, 5/16-18x¾THDFRM
539 10762827.. ....1 ....BATTERY HOLD DOWN
539 10762928.. ....2 ....NUT, ¼, PUSH NYLON
CHASSIS / FRAME
539 10763229.. ....2 ....BOLT,¼x7½,SPEC
539 11003030.. ....2 ....BRACKET, DECK HANGER
Not used on Model 968999508
or 968999765
539 11007031.. ....2 ....SPRING, RETURN
539 11021932.. ....1 ....PUMP IDLER ARM
539 11031133.. ....1 ....PULLEY, IDLER
539 11031234.. ....2 ....MOTION LIMITER
539 11041135.. ....1 ....BELT, EZT
539 11043336.. ....1 ....GROMMET, FUEL LINE
539 11067437.. ....6 ....SCRW,#10-12x1½WSHHD
539 11086338.. ....2 ....MOUNTING BLOCK, TIE
539 97685639.. ....2 ....TIE-PLASTIC
539 97693440.. ....2 ....HCS, 5/16-18x¾
539 97693741.. ....2 ....HCS, 5/16-18x2
539 97693842.. ....1 ....HCS, 5/16-18x2¼
539 97697843.. ....4 ....NUT, ¼-20, NYLOC
539 99036244.. ....8 ....SCREW,¼-20x5/8SELF TAP
539 99051745.. ....3 ....WASHER, 3/8
539 99054646.. ....3 ....NUT, 3/8-16, CENTERLOCK
539 99055047.. ....1 ....WASHER, ½
539 99058548.. ....1 ....NUT, 5/16-18, WHIZLK
539 99065549.. ....1 ....HCS, 3/8-16x1½
539 10243650.. ....1 ....BATTERY, DRY
539 11049551.. ....1 ....REAR BRACKET, TOOL BOX
Model 968999281 only
539 99036952.. ....4 ....SCREW, 5/16-18x1THDFRM
NOT SHOWN
539 107616....1 ....BATTERY CABLE, POS
539 110068....1 ....BATTERY CABLE, NEG
539 110309....1 ....WIRING HARNESS
539 110290....2 ....FOAM STRIP, FUEL TANK

6
CHASSIS / FRAME
52
2
4
5
7
9
10
13
12 37
43
15
14
18
8
6
11
1
17
26
26
3
28
19
20
21
22
25
24
25
26
26
27
17 31 16
16
51
23
29
30
32
33
34
35
36
38
39
40
17
41
42
43
44
44
47
46
45
48
49
50
17
For Units with Serial Number After 0752XXXXX
53
26 55
54

7
ITEM PART NO. QTY. DESCRIPTION ITEM PART NO. QTY. DESCRIPTION
539 1010801.. ....2 ....SWITCH-INTERLOCK
539 1011512.. ....2 ....RING-RETAINING EXT, 7/8
539 1026783.. ....2 ....SCREW PLATE, #10-24
539 1052454.. ....1 ....GROMMET, RUBBER
539 1061885.. ....1 ....FUEL CAP, ANTISPLASH
539 1095526.. ....4 ....LOCKWASHER, 3/16
539 1103777.. ....1 ....CHASSIS W/DECALS
539 1103788.. ....1 ....CONSOLE W/DECALS
539 1102529.. ....1 ....FUEL TANK
539 11028410.. ....1 ....FOOT REST
539 11029411.. ....2 ....WASHER, 7/8, WAVE
539 11031012.. ....1 ....SLIP, MATTING
539 11043213.. ....1 ....STEM, FUEL TANK
539 11086014.. ....2 ....SWITCH BRACKET
539 92378715.. ....4 ....BUSHING
539 97695216.. ....4 ....SCREW,#10-24x5/8
539 99071717.. ..11 ....NUT, 5/16-18, NYLOC
539 10123118.. ....1 ....SPINDLE-IDLER
539 10133119.. ....1 ....NUT, ½-13, NYLOC
539 10133220.. ....1 ....HCS,½-13x2¾
539 10171421.. ....1 ....SOLENOID
539 10197722.. ....1 ....SPRING
539 10258723.. ....3 ....GROMMET, BUMPER
539 10275924.. ....3 ....INSULATOR-BATTERY
539 10711625.. ....2 ....GROMMET
539 10747526.. ..33 ....BOLT, 5/16-18x¾THDFRM
539 10762827.. ....1 ....BATTERY HOLD DOWN
539 10762928.. ....2 ....NUT, ¼, PUSH NYLON
539 10763229.. ....2 ....BOLT,¼x7½,SPEC
539 11003030.. ....2 ....BRACKET, DECK HANGER
Not on Models 968999508 or
968999765
CHASSIS / FRAME
539 11007031.. ....2 ....SPRING, RETURN
539 11021932.. ....1 ....PUMP IDLER ARM
539 11031133.. ....1 ....PULLEY, IDLER
539 11031234.. ....2 ....MOTION LIMITER
539 11041135.. ....1 ....BELT, EZT
539 11043336.. ....1 ....GROMMET, FUEL LINE
539 11067437.. ....6 ....SCRW,#10-12x1½WSHHD
539 11086338.. ....2 ....MOUNTING BLOCK, TIE
539 97685639.. ....2 ....TIE-PLASTIC
539 97693440.. ....2 ....HCS, 5/16-18x¾
539 97693741.. ....2 ....HCS, 5/16-18x2
539 97693842.. ....1 ....HCS, 5/16-18x2¼
539 97697843.. ....6 ....NUT, ¼-20, NYLOC
539 99036244.. ....8 ....SCREW,¼-20x5/8SELF TAP
539 99051745.. ....3 ....WASHER, 3/8
539 99054646.. ....3 ....NUT, 3/8-16, CENTERLOCK
539 99055047.. ....1 ....WASHER, ½
539 99058548.. ....1 ....NUT, 5/16-18, WHIZLK
539 99065549.. ....1 ....HCS, 3/8-16x1½
539 10243650.. ....1 ....BATTERY, DRY
539 99007151.. ....2 ....HCS,¼x½
539 11379252.. ....1 ....SWITCH, BRAKE
539 11480353.. ....1 ....BRACKET, SWITCH
539 11049554.. ....1 ....REAR BRACKET, TOOL BOX
Model 968999281 only
539 99036955.. ....4 ....SCREW, 5/16-18x1THDFRM
NOT SHOWN
539 107616....1 ....BATTERY CABLE, POS
539 110068....1 ....BATTERY CABLE, NEG
539 114720....1 ....WIRING HARNESS
539 110290....2 ....FOAM STRIP, FUEL TANK

8
17
ENGINE
Kohler 18 HP
3
15
16
1
8
18
11
7
2
13
10
12
4
14
6
5
9

9
ITEM PART NO. QTY. DESCRIPTION ITEM PART NO. QTY. DESCRIPTION
ENGINE
539 9901871.. ....2 ....WASHER 5/16 SLW
539 1074762.. ....3 ....BOLT, 3/8-16x1,THDFRM
539 1081203.. ....1 ....NUT, ¼-20, THIN, NYLOC
539 1100644.. ....1 ....CLUTCH WASHER
539 1100935.. ....1 ....OIL DRAIN FITTING
539 1104176.. ....1 ....CLUTCH
539 1104257.. ....1 ....FUEL LINE, 5"
539 1119028.. ....1 ....MUFFLER
539 1145309.. ....1 ....PULLEY, ENGINE
539 11454210.. ....1 ....SPACER, ENGINE PULLEY
539 91222211.. ....2 ....CLAMP, HOSE
539 92338812.. ....1 ....HCS, 7/16-20x3
539 97693813.. ....1 ....HCS 5/16-18x2¼
539 99024714.. ....1 ....WASHER 7/16 SLW
539 10857615.. ....1 ....WASHER 5/16x19/32
539 99018416.. ....2 ....NUT 5/16-18 HEX CTRLK
539 99069217.. ....2 ....WASHER, 5/16 STD FLT
539 99020918.. ....2 ....HCS 5/16-18x1

10
ENGINE
Kohler 20 HP
11
2
3
4
5

7
8
9
10
12
13
14
15
1
17
16

11
ITEM PART NO. QTY. DESCRIPTION ITEM PART NO. QTY. DESCRIPTION
ENGINE
1...539 107476... 3... BOLT, 3/8-16x1,THRDFORM
2...539 108120... 1... NUT, ¼-20, THIN, NYLOC
3...539 110064... 1... CLUTCH WASHER
4...539 976938... 1... HCS 5/16-18x2½ZD
5...539 110417... 1... CLUTCH
6...539 110425... 1... FUEL LINE, 5"
7...539 114530... 1... PULLEY, ENGINE
8...539 114542... 1... SPACER, ENGINE PULLEY
9...539 912222...2... CLAMP, HOSE
10...539 923388 ... 1... HCS, 7/16-20x3
11 ...539 990184... 2... NUT, 5/16-18, CENTERLOCK
12...539 990247 ... 1... LOCKWASHER, 7/16
13...539 990390 ... 1... WASHER, 3/8
14... 539 111902... 1... MUFFLER
15...539 990209 ... 2... HCS, 5/16-18 X 1
16...539 990187 ... 2... WASHER 5/16 SLW ZD
17...539 110093... 1... OIL DRAIN FITTING

12
ENGINE
Briggs & Stratton 16 HP
15
314
1
10
7
28
11
4
13
6
5
9
12
16

13
ITEM PART NO. QTY. DESCRIPTION ITEM PART NO. QTY. DESCRIPTION
539 9905461.. ....1 ....NUT, 3/8-16 HEX CNTRLK
539 1074762.. ....3 ....BOLT, 3/8-16x1,THDFRM
539 1081203.. ....1 ....NUT, ¼-20, THIN, NYLOC
539 1100644.. ....1 ....CLUTCH WASHER
539 1100935.. ....1 ....OIL DRAIN FITTING
539 1104176.. ....1 ....CLUTCH
539 1104257.. ....1 ....FUEL LINE, 5"
539 1145308.. ....1 ....PULLEY, ENGINE
539 1145429.. ....1 ....SPACER, ENGINE PULLEY
539 91222210.. ....2 ....CLAMP, HOSE
539 92338811.. ....1 ....HCS, 7/16-20x3
539 11002512.. ....1 ....BOLT 3/8-16x1.5THDFRM
539 99024713.. ....1 ....WASHER 7/16 SLW ZD
539 99039014.. ....1 ....WASHER, 3/8
539 12137115.. ....1 ....EXTENSION, MUFFLER
539 11553716.. ....4 ....SCREW,#10-16x½
ENGINE

1414
Briggs & Stratton 19 HP
1
2
3
4
5
6
7
8
9
10
11
12
13
9
ENGINE
14

1515
ITEM PART NO. QTY. DESCRIPTION ITEM PART NO. QTY. DESCRIPTION
1...539 107476... 3... BOLT, 3/8-16x1,THDFRM
2...539 108120...1... NUT, ¼-20, THIN, NYLOC
3...539 110025... 1... BOLT, 3/8-16x1½,THDFRM
4...539 110064... 1... CLUTCH WASHER
5...539 110093... 1... OIL DRAIN FITTING
6...539 110417... 1... CLUTCH
7...539 114530... 1... PULLEY
8...539 110425... 1... FUEL LINE, 5"
9...539 912222...2... CLAMP, HOSE
10...539 923388 ... 1... HCS, 7/16-20x3
11 ...539 990247... 1... WASHER, 7/16
12...539 990390 ... 1... WASHER, 3/8, ITLW
13...539 990546 ... 1... NUT, 3/8 -16, CENTERLOCK
14...539 114542... 1... SPACER, PULLEY
NOT SHOWN
... 539 111902... 1... MUFFLER
ENGINE

16
ENGINE
Briggs & Stratton 24 & 26 HP
1
2
3
4
5
6
7
8
9
10
11
12
13
13
9
14
15

17
ITEM PART NO. QTY. DESCRIPTION ITEM PART NO. QTY. DESCRIPTION
ENGINE
1...539 107476... 3... BOLT, 3/8-16x1,THRDFRM
2...539 108120...1... NUT, ¼-20, THIN, NYLOC
3...539 990390... 1... WASHER, 3/8, ITLW
4...539 110064... 1... CLUTCH WASHER
5...539 110093... 1... OIL DRAIN FITTING
6...532 110417... 1... CLUTCH
7...539 114530... 1... PULLEY
8...539 110425... 1... FUEL LINE, 5"
9...539 912222...4... CLAMP, HOSE
10...539 923388 ... 1... HCS, 7/16-20x3
11 ...539 990247... 1... WASHER, 7/16
12...539 110025... 1... BOLT, 3/8-16x1½,THRDFRM
13...539 976979 ... 2... NUT, 3/8-16, HEX NYLOC
14...539 108212 ... 1... FUEL LINE
15...539 114542... 1... SPACER, ENGINE
NOT SHOWN
...539 109843... 1... MUFFLER
...539 109844... 1... MANIFOLD
...539 109980...1... MUFFLER CLAMP
...539 107098... 1... CLAMP
...539 107937...1... OIL DRAIN HOSE

18
12
3
4
5
6
7
8
9
10
11
14
13
12
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
30
STEERING

19
ITEM PART NO. QTY. DESCRIPTION ITEM PART NO. QTY. DESCRIPTION
STEERING
539 1028271.. ....2 ....SPACER
539 1028282.. ....2 ....BOLT, 5/16-18x5/8, SKT HD
539 1035473.. ....2 ....WASHER, ¼
539 1050694.. ....2 ....RING-E, 5/8
539 1081205.. ....2 ....NUT, ¼-20, THIN, NYLOC
539 1084606.. ....2 ....BOLT, 5/16-18x1¼
539 1087937.. ....2 ....DAMPENER
539 1100218.. ....2 ....POST, RETURN
539 1101429.. ....1 ....SHAFT, MOTION
539 11014510.. ....1 ....MOTION CASTING
539 11023311.. ....1 ....MOTION CONTROL ARM, LT
539 11023612.. ....1 ....MOTION CONTROLARM, RT
539 11043013.. ....1 ....BUSHING
539 11034014.. ....1 ....NUT, 5/8-11, NYLOC
539 11026815.. ....1 ....BRAKE ROD, RT
539 11026916.. ....1 ....BRAKE ROD, LT
539 11028217.. ....1 ....BRAKE LEVER
539 11034218.. ....2 ....SPRING
539 11047719.. ....1 ....SPRING, BRAKE LEVER
539 11047820.. ....1 ....CAP, BRAKE LEVER
539 11067521.. ....1 ....SPRING BRACKET
539 11312122.. ....2 ....MOTION BUSHING
539 91615923.. ....1 ....SPRING, TRANS
539 97693524.. ....1 ....HCS, 5/16-18x1½
539 97693725.. ....1 ....HCS, 5/16-18x2
539 97697826.. ....2 ....NUT, ¼-20, NYLOC
539 97698827.. ....2 ....PINHAIR,.073x17/16
539 99058528.. ....1 ....NUT, 5/16-18, WHIZLK
539 99069229.. ....2 ....WASHER, 5/16
539 99071730.. ....2 ....NUT, 5/16-18, NYLOC
539 99103431.. ....2 ....SCRW,#10-24x5/8, WSH HD
539 99111232.. ....2 ....NUT, ¼-20, JAM
539 99064333.. ....4 ....HCS,¼-20x7/8
539 11033834.. ....2 ....CONTROL LEVER
539 11033735.. ....2 ....GRIP, CONTROL LEVER

20
1
2
3
4
5
6
7
11
12
13
14
9
10
IGNITION SYSTEM
16
8
15
15
Models 968999508, 968999512, 968999517, 968999765
15