Husqvarna RZ4621 User manual

Parts Manual
RZ4621 / 966659101 RZ4621 CA / 966659201
RZ5424 / 966659301 RZ4222F / 966659401
RZ4621 BF / 966676501 RZ4623 / 966678201
RZ4824F / 966678301 RZ5424 / 966691901
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
The machine’s manufacturing number can be found on
the printed plate affixed 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.
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.
©2010 All rights reserved.
Orangeburg, SC Printed in U.S.A.
This Parts Manual belongs to the machine with the
manufacturing number:
Engine Transmission

CONTENTS
NOTE: ALL FASTENERS ARE GRADE 5 UNLESS OTHERWISE SPECIFIED.
FRAME ...................................................................................4
ENGINE PLATE
966659101, 966659201, 966676501 ..............................6
966659301 ......................................................................8
966659401 ....................................................................10
966678301, 966691901 ................................................12
966678201 ....................................................................14
STEERING ...........................................................................16
IGNITION
966659101, 966676501 ................................................18
966659201 ....................................................................20
966678201, 966678301, 966659401
966659301, 966691901 ................................................22
BRAKE / LIFT .......................................................................24
HYDRAULIC PUMP- MOTOR ..............................................26
WHEELS AND TIRES ...........................................................28
MOWER DECK / CUTTING DECK
42" DECK ......................................................................30
46" DECK ......................................................................32
48" DECK ......................................................................34
54" DECK ......................................................................36
SEAT ....................................................................................38
DECALS ...............................................................................40

1
26
6
31
22
20
7
17
15
2
3
13
9
12
8
4
16
27
31
31
24
23
31
14
33
12
20
17
910
17
34
27
27
28
32
19
21
FRAME
25
27
11
5
18
24
30
29
29
30
31
4

FRAME
510 2618021.. .... 1 .... PLATE, OUTER BRAKE BLK
510 2067032.. .... 1 .... PLATE, BRAKE LATCH BLK
510 2456043.. .... 1 .... PLATE, LIFT OUTER BLK
510 2405024.. .... 1 .... PLATE, LIFT INNER BLK
522 8429025.. .... 1 .... FOOT PLATE w/DECALS
522 7195046.. .... 1 .... FOOT REST ORG
522 4433027.. .... 1 .... MOUNT, STRUT RT BLK
522 4433048.. .... 1 .... MOUNT, STRUT LT BLK
510 2259029.. .... 2 .... SUPPORT, FENDER BLK
510 17750310.. .... 1 .... FRAME, FRONT RT ORG
510 17740311.. .... 1 .... FRAME, FRONT LT ORG
539 97698912.. .... 3 .... HAIRPIN
539 10441113.. .... 1 .... KNOB w/ STUD
539 11478914.. .... 2 .... SWIVEL
521 93810115.. .... 1 .... LINK, FRONT SUSPENSION
515 98810116.. .... 6 .... SPACER ½ OD x 1½
539 10258717.. .... 6 .... GROMMET, BUMPER
539 10252618.. .... 1 .... LIFT PIN
539 10134119.. .... 8 .... HCS 3/8-16 x 3
539 10172120.. .... 3 .... HCS 5/16-18 x 2¾
539 10233521.. .... 4 .... HCS 5/16-18 x 4
539 97693822.. .... 6 .... HCS 5/16-18 x 2¼
539 97776123.. .... 2 .... HCS ¼-20 x 1
539 99064524.. .... 4 .... RHSNB 3/8-16 x 1
539 11197625.. .... 6 .... BOLT 3/8-16 x 25/8 THD FRM
539 10955426.. .... 2 .... WASHER ½ FLT
539 99018827.. .. 13 .... WASHER 5/16 SAE FLT
539 99005528.. .... 2 .... WASHER ¼ FLT
539 99051729.. .... 6 .... WASHER 3/8 STD FLT
539 20028230.. .... 6 .... NUT 3/8-16 HEX JAM NYLOC
539 11289931.. .. 15 .... NUT 5/16-18 HEX FLG NYLOC
521 99650132.. .... 8 .... NUT 3/8-16 HEX FLG NYLOC
539 11912433.. .... 2 .... NUT 7/16-14 HEX NYLOC
539 97697834.. .... 2 .... NUT ¼-20 HEX NYLOC
5
ITEM PARTNO. QTY. DESCRIPTION ITEMPARTNO. QTY. DESCRIPTION

ENGINE PLATE
1
19
24
22
23
21
5
3
13
12
9
7
15
2
4
6
28
16
26
27 8
20
11
10
24
25
14
23
18
17
966659101, 966659201, 966676501
6

ENGINE PLATE
575 3270021.. .... 1 .... PLATE, ENGINE BLK
539 1120922.. .... 1 .... ARM, IDLER
539 1012313.. .... 1 .... SPINDLE, IDLER
539 1103114.. .... 1 .... PULLEY, IDLER
505 2873015.. .... 1 .... CLUTCH, 105 FT/LBS
516 0118026.. .... 1 .... HITCH, BLK
539 1145307.. .... 1 .... PULLEY, ENGINE
539 1122528.. .... 1 .... SPACER
510 2460029.. .... 1 .... STOP, CLUTCH BLK
539 10136210.. .... 1 .... HOSE, DRAIN
539 10136411.. .... 1 .... PLUG, OIL
539 10136312.. .... 1 .... CLAMP
532 19610513.. .... 1 .... SPRING, DECK DRIVE
539 99020814.. .... 2 .... RHSNB 5/16-18 x 1
539 97694415.. .... 1 .... HCS 7/16-20 x 3½
539 10343316.. .... 1 .... HCS ½-13 x 3¼
539 99066917.. .... 1 .... HCS 5/16-18 x 1¾
539 97693518.. .... 3 .... HCS 5/16-18 x 1½
539 10938919.. .... 1 .... HCS 3/8-16 x 3½
539 99036220.. .... 1 .... SCREW ¼-20 x 5/8 THD FRM
539 10133121.. .... 1 .... NUT ½-13 HEX NYLOC
539 99058522.. .... 1 .... NUT 5/16-18 HEX WHIZLK
539 97697923.. .... 2 .... NUT 3/8-16 HEX NYLOC
539 11289924.. .... 6 .... NUT 5/16-18 HEX FLG NYLOC
539 11267025.. .... 1 .... WASHER, HEAVY
539 10955426.. .... 2 .... WASHER ½ FLT
539 99069227.. .... 2 .... WASHER 5/16 STD FLT
539 11006428.. .... 1 .... WASHER, CLUTCH
7
ITEM PARTNO. QTY. DESCRIPTION ITEMPARTNO. QTY. DESCRIPTION

ENGINE PLATE
966659301
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
19
26
28
28
32
8

ENGINE PLATE
575 3270021.. .... 1 .... PLATE, ENGINE BLK
532 1467002.. .... 1 .... TUBE, EXHAUST LT
532 1466993.. .... 1 .... TUBE, EXHAUST RT
539 1316044.. .... 1 .... MUFFLER ASSY TWIN
539 1120925.. .... 1 .... ARM, IDLER
539 1012316.. .... 1 .... SPINDLE, IDLER
539 1103117.. .... 1 .... PULLEY, IDLER
532 4000088.. .... 1 .... CLUTCH, 90 FT/LBS
510 2604029.. .... 1 .... BRACKET, MUFFLER BLK
510 26050210.. .... 1 .... GUARD, MUFFLER BLK
539 11453011.. .... 1 .... PULLEY, ENGINE
532 19610512.. .... 1 .... SPRING, DECK DRIVE
577 09460113.. .... 1 .... SPACER
522 44250614.. .... 1 .... STOP, CLUTCH BLK
539 10136215.. .... 1 .... HOSE, DRAIN
539 10136416.. .... 1 .... PLUG, OIL
539 10136317.. .... 1 .... CLAMP
539 99031618.. .... 1 .... RHSNB 5/16-18 x ¾
539 99020819.. .... 2 .... RHSNB 5/16-18 x 1
576 96800120.. .... 1 .... HCS 7/16-20 x 2½ GR 8
539 10343321.. .... 1 .... HCS ½-13 x 3¼
539 10938922.. .... 1 .... HCS 3/8-16 x 3½
532 12061623.. .... 4 .... HHFS 3/8-16 x 1 THD FRM
539 10747524.. .... 4 .... BOLT 5/16-18 x ¾ THD FRM
539 99036225.. .... 1 .... SCREW ¼-20 x 5/8 THD FRM
539 97697926.. .... 2 .... NUT 3/8-16 HEX NYLOC
539 10133127.. .... 1 .... NUT ½-13 HEX NYLOC
539 11289928.. .... 5 .... NUT 5/16-18 HEX FLG NYLOC
539 99069229.. .... 2 .... WASHER 5/16 STD FLT
539 11267030.. .... 1 .... WASHER, HEAVY
539 11006431.. .... 1 .... WASHER, CLUTCH
539 10955432.. .... 2 .... WASHER ½ FLT
NOT SHOWN
532 198316 ... 1 .... ADAPTER, HARNESS
9
ITEM PARTNO. QTY. DESCRIPTION ITEMPARTNO. QTY. DESCRIPTION

ENGINE PLATE
966659401
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
19
26
28
28
32
10