Husqvarna MZ 54S User manual

MZ 54S
967 334101-00
Please read the operator manual carefully
and make sure you understand
the instructions before using the machine.
Parts Manual

When you need spare parts or support in service questions,
warranty issues, etc., please consult the following
professional:
This manual belongs to the machine with
the manufacturing number:
Engine Transmission
Manufacturing Number
The machine’s manufacturing number can be found on the printed plate afxed to the
engine compartment.
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.
©2015 All rights reserved.
Orangeburg SC. Printed in U.S.A.

CONTENTS
Illustrations may or may not represent the actual assemblies
and it is not recommended to use this manual as a guide to
assemble or disassemble the mower.
NOTE:AllfastenersareGrade5unlessotherwisespecied.
FRAME.................................................................................4
ENGINE MOUNTING, GUARDS & MUFFLER ....................6
STEERING ...........................................................................8
IGNITION SYSTEM............................................................10
PARKING BRAKE ..............................................................12
HYDRAULIC PUMP-MOTOR.............................................14
WHEELS & TIRES .............................................................16
MOWER LIFT / DECK LIFT................................................18
MOWER DECK / CUTTING DECK ....................................20
SEAT ..................................................................................22
DECALS .............................................................................24

4
MZ 54S, 967 334101-00FRAME
7
3
2
4
9
10
11
6
5
18
16
14
12
8
1
13
20
19
15
26
22
23
17
21
27
26 29
29
32
27
28
25
29
24
30
31
20
20
20
20
29
18
29
20

5
Ref. Part No. Qty Description
1 501 65 60-01 1 Frame w/ Safety Decals Org
2 586 89 30-02 1 Guard, Rear Gry
3 586 86 77-02 1 Support, Seat Org
4 539 13 15-77 1 Side, Left Blk
5 539 13 15-79 1 Side, Right Blk
6 539 13 27-44 1 Plate w/ Safety Decal
7 539 13 23-80 1 Plate, Footrest Org
8 587 04 87-02 1 Bracket, Battery Blk
9 575 24 52-02 2 Bracket, Dampener
10 575 53 36-02 2 Mount, Tank Blk
11 575 23 04-02 1 Shield,MuferBlk
12 587 99 05-01 2 Plug, Frame
13 539 13 28-59 1 Shield, Heat
14 505 25 64-01 2 Stop, Deck
15 539 10 25-87 7 Grommet, Bumper
16 539 10 59-74 1 Grommet, Rubber
17 539 10 44-11 1 Knob w/ Stud
18 539 13 30-06 2 Bolt 3/8-16 x 2 1/2 Hex Flange Head
19 874 49 06-44 2 Bolt 3/8-16 x 2-3/4 Hex Flange Head
20 874 49 05-12 18 Bolt 5/16-18 x 3/4 Hex Flange Head
21 874 49 05 60 4 Bolt 5/16-18 x 3-3/4 Hex Flange Head
22 525 54 40-01 1 Bolt 5/16-18 x 1-1/4 Hex Flange Head
23 539 10 23-35 2 Bolt 5/16-18 x 4 Hex Head
24 539 10 91-17 2 Bolt 3/8-16 x 3/4 Round Head Square Neck
25 539 99 02-08 3 Bolt 5/16-18 x 1 Round Head Square Neck
26 872 14 05-06 2 Bolt 5/16-18 x 1 Round Head Square Neck
27 539 20 02-82 6 Nut 3/8-16 Hex Jam Nyloc
28 521 99 65-01 2 Nut 3/8-16 Hex Flange Nyloc
29 539 11 28-99 12 Nut 5/16-18 Hex Flange Nyloc
30 819 11 11-16 2 Washer 5/16 SAE Flat Thick
31 539 99 02-50 1 Washer
32 819 13 24-16 2 Washer 16 Gauge Flat

6
MZ 54S, 967 334101-00ENGINE MOUNTING, GUARDS & MUFFLER
1
37
11
28
16
17
5
2
3
19
12
9
7
10
4
6
29
18
19
44
8
35
41
43
40
30
20
13
34
27
32
47
21
32
22
24
51
26
43
48
28
39
45
38
25
46
50
42
49
49
38
41
14
15
23
36
30
31
35
39
52

7
Ref. Part No. Qty Description
1 586 65 14-02 1 Plate, Engine, Blk
2 586 67 04-02 1 Plate, Idler Support, Blk
3 585 81 37-01 1 Pulley, Drive
4 539 97 66-88 1 Pulley, Idler
5 532 17 58 20 1 Pulley, Idler Secondary
6 574 87 09-01 1 Belt
7 525 43 56-01 1 Pivot, Idler
8 510 20 63-01 1 Pivot, Bearing
9 510 04 16-03 1 Arm, Idler w/ Bearings
10 532 17 93 35 1 Clutch
11 585 81 36-01 1 Stop, Clutch Blk
12 539 10 27-57 1 Cable, Positive
13 539 13 16-04 1 Mufer
14 581 88 10-01 1 Exhaust Tube, Right
15 581 88 11-01 1 Exhaust Tube, Left
16 532 19 25-07 1 Solenoid
17 510 25 44-01 1 Spring, Pump
18 539 11 46-62 1 Shield, Dust
19 510 25 45-01 2 Shield, Dust
20 575 22 99-02 1 Bracket,Mufer
21 539 91 27-57 1 Key 1/4 Sq x 1-1/4
22 532 16 53-91 2 Gasket,Mufer
23 539 10 27-59 1 Insulator
24 532 13 15-63 2 Insulator
25 539 10 47-63 4 Retainer, U Type 5/16-18
26 581 33 28-02 1 Bolt 7/16-20 x 2-1/2 Hex Head
27 539 10 34-33 1 Bolt 1/2-13 x 3-1/4 Hex Head
28 874 49 06-32 1 Bolt 3/8-16 x 2 Hex Flange Head
29 874 78 05-16 2 Bolt 5/16-18 x 1 Hex Head
30 874 49 05-12 11 Bolt 5/16-18 x 3/4 Hex Flange Head
31 539 10 72-71 2 Bolt 5/6-18 x 1 Round Head Square Neck
32 539 10 04-13 1 Bolt 3/8-16 x 1-1/4 Round Head Square Neck
33 539 13 02-35 1 Bolt 3/8-16 x 2-3/4 Round Head Square Neck
34 817 12 06-16 4 Screw 3/8-16 x 1 Thread Form
35 532 18 39-06 4 Screw 5/16-18 x 1 Socket Head
36 817 49 05-12 2 Screw 5/16-18 x 3/4 Thread Form
37 817 49 04-06 1 Screw 1/4-20 x 3/3 Thread Form
38 539 99 06-13 1 Nut 3/8-16 Hex Whiz Lock
39 539 11 28-99 15 Nut 5/16-18 Hex Flange Nyloc
40 521 99 11-01 1 Nut 1/2-13 Hex Flange Nyloc
41 539 20 02-82 4 Nut 3/8-16 Hex Jam Nyloc
42 521 99 65-01 2 Nut 3/8-16 Hex Flange Nyloc
43 539 10 81-20 3 Nut 1/4-20 Hex Thin
44 539 11 18-97 1 Washer, Special
45 539 11 55-28 1 Washer 1/2 Belleville
46 539 99 02-47 1 Washer 7/16 Slotted
47 539 10 95-62 1 Washer 3/8 x 3/4 Thick
48 819 11 11-16 2 Washer 5/16 SAE Flat
49 539 10 95-54 2 Washer 1/2 Flat
50 819 14 16-14 1 Washer 3/8 Flat
51 539 99 00-53 1 Washer 1/4 Internal Tooth Lock
52 539 10 65-04 1 Washer, Heavy
Not Shown
532 19 83-16 1 Adapter, Clutch
------------------ Engine, Briggs & Stratton
49T977 25 Hp
For Engine replacement parts, See B&S dealer

8
MZ 54S, 967 334101-00STEERING
1
2
3
4
5
6
7
8
9
10
11
12
23
14
15
16
17
18 19
20
21 22
27
26
28
10
24
13
28
28
28
27
21
2718
25
27
27

9
Ref. Part No. Qty Description
1 539 13 20-09 1 Lever w/ Grip Right
2 539 13 20-10 1 Lever w/ Grip Left
3 539 13 08-94 2 Grip, Foam
4 585 12 47-05 2 Bracket, Control
5 532 43 82-82 4 Bearing
6 587 18 77 01 2 Lever, Control
7 577 42 00-01 2 Lever, Handle
8 584 92 72-01 2 Spacer, Pivot Control
9 539 10 27-20 2 Dampener
10 581 43 75-01 2 Block, Tracking
11 539 10 28-45 1 Spring
12 576 85 03-01 1 Spring
13 539 13 17-99 1 Knob
14 574 81 14-01 2 Rod, Motion Control
15 539 11 66-89 2 Coupler, Rod End
16 539 11 66-90 2 Rod End Left
17 539 11 57-29 2 Rod End Right
18 874 78 05-20 5 Bolt 5/16-18 x 1-1/4 Hex Head
19 874 78 08 44 2 Bolt 1/2-13 x 2-3/4 Hex Head
20 539 97 69-35 4 Bolt 5/16-18 x 1-1/2 Hex Head
21 525 54 40-01 4 Bolt 5/16-18 x 1-1/4 Tap
22 874 49 05 12 8 Bolt 5/16-18 x 3/4 Hex Flange Head
23 576 85 04-02 2 Screw 5/16-18 x 1-3/4 Button Head
24 539 99 05-85 4 Nut 5/16-18 Hex Whiz Lock
25 539 10 80-10 2 Nut 1/2-13 Hex Jam Nyloc Grade 2
26 539 99 07-17 6 Nut 5/16-18 Hex Nyloc
27 539 11 28-99 10 Nut 5/16-18 Hex Flange Nyloc
28 819 11 11-16 12 Washer 5/16 Sae Flat

10
MZ 54S, 967 334101-00IGNITION SYSTEM
5
19
2
14
3
6
7
8
10
15
25
17
34
11
30
37
22
42
38
40
39
26
20
18
41
23
14
33
13
16
31
29
12
21
27
35
24
36
32
9
28 38
38
34
18
30

11
Ref. Part No. Qty Description
1 539 10 75-93 1 Console, Right Gry
2 585 72 23-01 1 Assembly, Tank Left Gry
3 576 46 92-01 1 Fitting, Fuel
4 539 11 24-38 1 Control, Throttle
5 539 11 24-39 1 Control, Choke
6 539 10 52-45 1 Grommet, Rubber
7 576 61 82-01 1 Grommet, Check Valve
8 576 61 81-01 1 Valve, Fuel Check
9 574 45 55-01 1 Key
10 575 01 81-01 1 Fuel Cap w /Tether
11 539 10 24-36 1 Battery
12 588 10 72-01 1 Bracket, Battery Mount
13 588 03 07-01 1 Cable, Battery Pos Red
14 588 03 08-01 1 Cable, Battery Neg Blk
15 539 11 37-92 1 Switch, Brake
16 574 45 54-01 1 Switch, Ignition
17 539 13 16-27 1 Switch, PTO
18 532 10 95-53 2 Switch, Interlock
19 532 43 53-95 1 Cover, Terminal
20 539 10 28-45 6 Spring
21 586 12 39-01 1 Assembly, Fuel Hose
22 539 13 30-49 1 Knob
23 575 43 65-01 2 Clamp, Hose
24 587 04 45-39 1 Hose 3/16 Vapor
25 586 16 18-01 1 Meter, Service
26 574 84 12-04 1 Plate, Console, Blk
27 539 13 16-71 2 Support, Tank Blk
28 539 10 31-78 1 Nutcap, Switch
29 539 10 25-02 6 Stud, Tank
30 581 22 30-01 2 Plate, Nut
31 510 06 40-01 2 Hook, J
32 872 14 05-06 2 Bolt 5/16-18 x 3/4 Round Head Square Neck
33 874 78 05-12 2 Bolt 5/16-18 x 3/4 Hex Head
34 574 82 27-01 4 Screw #10-24 x 3/4 Socket Head
35 539 99 04-11 6 Screw #10-24 x 1/2 Slotted Hex Head
36 817 49 05-16 3 Screw 5/16-18 x 1 Washer Head
37 539 99 09-97 2 Nut 1/4-20 Wing Nut Nyloc
38 539 11 28-99 13 Nut 5/16-18 Hex Flange Nyloc
39 539 97 69-77 2 Nut #10-24 Hex Nylon Ring
40 819 11 11-16 8 Washer 5/16 SAE Flat
41 819 07 08-18 4 Washer 1/2 18 Gauge
42 810 03 05-00 2 Washer, Slotted Lock
NOT SHOWN
585 99 97-01 1 Harness, Wiring

12
MZ 54S, 967 334101-00PARKING BRAKE
8
5
4
2
1
12
11
9
19
16
13
20
21
17
10
15
3
7
6
22
13
24
23
18
27
25
29
26
30
14
31
28
32
36
33
34
37
35
38
28
32
28

13
Ref. Part No. Qty Description
1 539 13 21-51 1 Arm, Brake
2 539 10 50-36 1 Grip, Brake Handle
3 575 22 96-02 1 Bracket, Right Blk
4 575 22 97-02 1 Bracket, Left Blk
5 586 73 88-02 1 Lever, Brake
6 575 23 02-01 2 Spring, Return
7 575 23 03-01 2 Spring, Engagement
8 539 13 21-58 1 Mount, Brake
9 539 13 21-54 1 Actuator, Switch
10 539 13 21-53 1 Bellcrank, Brake
11 539 13 24-24 1 Linkage, Brake
12 575 22 98-02 2 Bracket, Brake
13 539 13 21-61 4 Bushing, Brake
14 539 10 47-63 3 Retainer, U Type 5/16-18
15 539 13 21-73 1 Cable, Brake Short
16 539 13 21-74 2 Cable, Brake Long
17 505 28 00-01 2 Tie Wrap w/ Clip
18 539 99 06-43 4 Bolt 1/4-20 x 7/8 Hex Head
19 539 10 83-96 1 Bolt 5/16-18 x 2-1/2 Hex Head Tap
20 539 99 05-63 2 Bolt 3/8-16 x 1 Hex Head
21 539 99 02-09 1 Bolt 5/16-18 x 1 Hex Head
22 539 11 03-03 2 Bolt 5/16 Shoulder
23 539 99 06-45 2 Bolt 3/8-16 x 1 Round Head Square Neck
24 539 99 03-16 1 Bolt 5/16-18 x 3/4
25 539 13 17-80 1 Bolt 5/16-18 x 3-3/4 Hex Flange Head
26 874 49 05-12 1 Bolt 5/16-18 x 3/4 Hex Flange Head
27 539 11 28-99 4 Nut 5/16-18 Hex Flange Nyloc
28 539 99 05-85 5 Nut 5/16-18 Hex Whiz Lock
29 539 99 07-17 1 Nut 5/16-18 Hex Nyloc
30 521 99 65-01 2 Nut 3/8-16 Hex Flange Nyloc
31 539 11 56-17 2 Nut 5/16 Hex Nyloc
32 539 20 02-82 2 Nut 3/8-16 Hex Jam Nyloc
33 539 97 69-78 4 Nut 1/4-20 Hex Nyloc
34 539 10 78-97 2 Nut 5/16-18 Hex Jam
35 539 99 00-55 8 Washer 1/4 SAE Flat
36 539 13 30-07 1 Washer, Wave
37 539 99 01-22 2 Washer 3/8 SAE
38 539 10 95-54 1 Washer 1/2 Flat

14
MZ 54S, 967 334101-00HYDRAULIC PUMP-MOTOR
18
15
7
10
24
26
3
14
5
19
2
6
20
1
4
27
21
17
22
11
16
21
28
23
24
25
23
23
9
12
13
8

15
Ref. Part No. Qty Description
1 577 22 77-02 1 Trans, ZT-3100, Left
2 577 22 77-01 1 Trans, ZT-3100, Right
3 575 01 71-02 1 Bracket, Trans, Left
4 575 01 70-02 1 Bracket, Trans, Right
5 539 13 16-16 1 Linkage, Bypass Left
6 539 13 16-18 1 Linkage, Bypass Right
7 574 89 21-01 2 Hose, Expansion
8 586 06 75-01 1 Hose, Fuel
9 585 31 82-01 1 Tank, Expansion
10 584 99 42-02 2 Cover, Fan
11 539 11 34-66 2 Filter, Hydro
12 530 09 56-46 1 Filter
13 586 07 27-01 1 Cap, Tank
14 574 86 85-01 1 Tube, Spacer
15 539 10 25-87 2 Grommet, Bumper
16 539 97 69-88 2 Pin
17 539 99 06-43 1 Bolt 1/4-20 x 7/8 Hex Head
18 539 99 02-09 4 Bolt 5/16-18 x 1 Hex Head
19 539 10 17-21 4 Bolt 5/16-18 x 2-3/4 Hex Head
20 539 10 85-51 2 Bolt 3/8-16 x 2-1/2 Hex Head Grade 8
21 574 23 38-01 4 Bolt 5/16-18 x 2-1/4 Hex Flange Head
22 539 97 69-78 1 Nut 1/4-20 Hex Nyloc
23 539 11 28-99 8 Nut 5/16-18 Hex Flange Nyloc
24 539 99 01-88 8 Washer 5/16 SAE Flat
25 539 99 01-18 2 Washer 3/8 Split Lock
26 539 99 01-87 4 Washer 5/16 Slotted Lock
27 539 99 00-55 1 Washer 1/4 SAE Flat
28 539 99 01-22 2 Washer 3/8 SAE Flat

16
MZ 54S, 967 334101-00WHEELS & TIRES
3
9
13
14
1
2
4
12 5
7
6
10
8
11

17
Ref. Part No. Qty Description
1 580 74 70-01 2 Assembly, Wheel 22 x 10-10
2 581 19 95-01 2 Assembly, Wheel 13 x 6.5
3 539 10 25-43 4 Bearing
4 539 10 25-35 2 Cap, Grease
5 575 32 92-02 2 Yoke, Caster, Org
6 539 10 28-51 2 Seal
7 575 33 49-01 2 Spacer, Pivot
8 539 10 14-74 2 Zerk
9 539 10 28-89 2 Pin 1/8 x 2 Cotter
10 539 10 55-17 2 Bolt 1/2-13 x 9-1/2 Hex Head
11 539 10 28-52 2 Nut 1-14 Slotted Jam
12 521 99 11-01 2 Nut 1/2-13 Hex Flange Nyloc
13 539 10 11-73 8 Nut 1/2-20 Lug
14 539 10 95-54 2 Washer 1/2 Flat

18
MZ 54S, 967 334101-00MOWER LIFT / DECK LIFT
36
2
14
20
19
22
15
17
3
21
10
11
4
9
13
1
26
23
24
25
32
28
33
34
30
31
29
37
35
36
39
18
6
7
5
41 12
16
23
41
23
27
40
38
3
27
2
35
34
8

19
Ref. Part No. Qty Description
1 510 40 83-01 1 Pedal, Foot
2 539 11 08-08 2 Link, Deck Lift
3 586 70 17-01 2 Spacer, Idler
4 539 13 18-61 1 Spacer
5 586 92 87-02 1 Shaft, Front Lift Blk
6 584 39 27-02 2 Plate, Reinforcement
7 539 13 18-97 1 Bellcrank, Rear, Lift Blk
8 539 13 18-53 1 Bellcrank, Rear, Right Blk
9 539 11 22-23 2 Linkage, Strut
10 539 10 96-93 4 Lift Chain-3 Link
11 539 13 15-66 1 Latch, Transport
12 539 10 50-59 1 Lanyard
13 539 13 17-91 1 Mount, Spring
14 539 13 20-17 2 Mount, Strut
15 539 13 17-92 1 Tab, Spring
16 539 11 28-96 1 J-Bolt
17 539 10 26-42 1 Spring
18 539 13 27-34 1 Spring, Torsion
19 539 13 18-50 1 Height Adjust, Deck
20 539 13 18-60 1 Pivot Latch, Transport
21 539 10 48-08 4 Pillow Block
22 539 13 21-82 1 Pin 1/2 x 1-1/2 Detent Ring
23 539 99 10-43 10 Bushing 5/8
24 539 13 28-51 1 Grip
25 539 11 55-01 6 Pin, Cotter 1-3/4
26 539 10 17-21 4 Bolt 5/16-18 x 2-3/4 Hex Head
27 539 10 81-81 2 Bolt 1/2-13 x 1-3/4 Hex Head Grade 8
28 539 99 05-63 4 Bolt 3/8-16 x 1 Hex Head
29 539 10 11-75 4 Bolt 7/16-14 x 1-1/2 Hex Head
30 874 78 06-48 1 Bolt 3/8-16 x 3 Hex Head
31 539 99 06-46 1 Bolt 1/2-13 x 1 Hex Head
32 539 10 80-73 4 Bolt 7/16-14 x 1-3/4 Hex Head
33 539 20 02-82 2 Nut 3/8-16 Hex Jam Nyloc
34 539 13 20-19 8 Nut 7/16-14 Hex Whiz Lock Smooth
35 539 10 25-82 8 Nut 7/16-14 Hex Whiz Lock Heavy
36 539 11 28-99 5 Nut 5/16-18 Hex Flange Nyloc
37 539 97 69-79 4 Nut 3/8-16 Hex Nyloc
38 539 10 13-31 4 Nut 1/2-13 Hex Nyloc
39 819 14 14-16 1 Washer 3/8 Flat
40 539 10 28-43 1 Washer 7/16 Spring
41 539 10 95-54 2 Washer 1/2 Flat

20
MZ 54S, 967 334101-00MOWER DECK / CUTTING DECK
1
2
4
5
6
7
9
10
11
12
13
14
15
17
19
20
21
22
26
33
38
29
30
32
27
34
35
37
39
41
32
42
42
45
47
48
51
46
28
49
40
18
36
3
31
24
52
43
8
16
25
44
50
6
55
54
53
53
43
36
37
23