Wright Manufacturing Stander 48, Stander 52, Stander 61 User Manual

1.59 Mb

48", 52", 61" CUTTER DECKS

REF #	PART #	DESCRIPTION	48 52 61
1	93430001	CUTTER DECK,48" W/CAPS(33) & DECALS	X
1	93440001	CUTTER DECK,52" W/CAPS(33) & DECALS		X
1	93450001	CUTTER DECK,61" W/CAPS(33) & DECALS			X
2	93430002	DECK COVER, 48"	X
2	93440002	DECK COVER, 52"		X
2	93450002	DECK COVER, 61"			X
3	17460001	CAP, VINYL 2 1/2 X 1 1/2, DECK CVR	X	X	X
4	18410001	KNOB, BLACK PLASTIC FOR DECK COVER	X	X	X
5	11990005	BOLT, HEX 3/8-16 X 2 Z5	X	X	X
6	13990010	WASHER, FLAT USS 5/16 Z	X	X	X
7	71460009	PULLEY, IDLER 5 3/4x1-1/16x3/8bore	X	X	X
8	24460001	STUD, THREADED, 3/8-24	X	X	X
9	15990007	HITCH PIN CLIP #213	X	X	X
10	15990010	E-CLIP 7/8	X	X	X
11	13990017	MACHINE BUSHING 7/8 ID 1 3/8 OD 14GA	X	X	X
12	14990001	BUSHING, BRONZE (VELKE# VPIVOTBUSH)	X	X	X
13	98490002	IDLER ARM W/BUSHINGS (12)	X	X	X
14	12990008	NUT, LOCK FLANGE 3/8-16 z	X	X	X
15	93490001	IDLER ARM BASE	X	X	X
16	11990012	BOLT, FLANGE 5/16x3/4 z5	X	X	X
17	12990007	NUT, LOCK FLANGE 5/16-18 z	X	X	X
18	12990021	NYLON LOCKNUT, 5/16-18 z	X	X	X
19	85460014	IDLER ADJUSTMENT ROD, 3/8 X 7"	X	X	X
19A	85460030	IDLER ADJUSTMENT ROD, 3/8 X 8"		X	X
20	71460006	PULLEY, IDLER 4 1/2 x 1 x 3/8 bore	X	X	X
21	12990003	NUT, HEX 5/8-11 z FOR BLADES	X	X	X
22	13990007	BLADE SPACER 5/8x1 1/2x1/4	X	X	X
23	11990033	BOLT, HEX 1/4-20 X 7/8 P5	X	X	X
24	71460008	BUSHING, SPLIT TAPERED 1"	X	X	X
25	71460004	PULLEY, SINGLE GRV 5 3/4OD-A/B	X	X	X
26	71460005	PULLEY, DOUBLE GRV 5 3/4 OD A/B	X	X	X
27	71460011	BELT, ENGINE TO BLADE 48" WS	X
27	71460003	BELT, ENGINE TO BLADE 52" WS		X
27	71460013	BELT, ENGINE TO BLADE 61" WS			X
28	71460010	BELT, BLADE TO BLADE 48" WS	X
28	71460002	BELT, BLADE TO BLADE 52" WS		X
28	71460012	BELT, BLADE TO BLADE 61" WS			X
29	93460002	CHUTE DEFLECTOR, WS	X	X	X
30	16460002	SPRING, TORSION, FOR CHUTE DEFLECTOR	X	X	X
31	11990003	BOLT, HEX 5/16-18 X 4 1/2 Z5	X	X	X
32	11990027	BOLT, HEX 5/16-18 X 1 Z5	X	X	X
33	17460002	CAP, VINYL 3/8 x 1	X	X	X
34	12990010	NUT, LOCK FLANGE 1/2-13 z	X	X	X
35	11990015	BOLT, FLANGE 1/2x1 1/4 z5	X	X	X
36	11990046	BOLT, FLANGE 3/8x1 z5	X	X	X
37	72490001	WHL, PLASTIC, 5"x2-3/4" w5/8"bore		X	X
38	12990022	NUT, NYLON, JAM 1/2-13, SCALP ROLLERS		X	X
39	13990016	MACH BUSH 5/8 ID 1 OD 14 GA		X	X
40	11990022	BOLT, SHLDR ALLN 5/8 X 2.75-ROLLERS		X	X

REF #	PART #	DESCRIPTION	48 52 61
41	11990030	BOLT, FLANGE 3/8-16 X 3/4 Z5	X	X	X
57	15990003	MACHINE KEY 1/4X1/4X1	X	X	X
58	71440002	BLADE, 16 1/2", FOR 48" DECK	X
58	71440001	BLADE, 18", FOR 52" DECK		X
58	71440003	BLADE, 21", FOR 61" DECK			X
59	13990011	WASHER, FLAT USS 5/8	X	X	X
60	11990014	BLADE BOLT, HEX 5/8-11 X 10 Z5	X	X	X
61	71460007	SPINDLE ASSEMBLY	X	X	X
62	71460014	EXTERNAL RETAINING RING	X	X	X
63	71460015	INTERNAL RETAINING RING	X	X	X
64	71460016	WASHER, LARGE	X	X	X
64A	71460021	WASHER, SMALL	X	X	X
65	71460017	BEARING	X	X	X
66	71460018	SPINDLE HOUSING	X	X	X
67	71460019	ZERK FITTING	X	X	X
68	71460020	SPINDLE SHAFT	X	X	X
69	WRJ300-3	STANDER GRASS GOBBLER (INCL 70 & 71)	X	X	X
70	GGL1-1	GRASS GOBBLER LATCH	X	X	X
71	GGD4-4	DOOR	X	X	X
72	LG1000	LEAF GOBBLER (4.6 CU. FT)	X	X	X
73	95430001	MULCH PLATE KIT, 48"	X
73A	95440001	MULCH PLATE KIT, 52"		X
73B	95450001	MULCH PLATE KIT, 61"			X
74	16460005	SPRING, DECK IDLER	X	X	X
75	12990020	NYLON LOCKNUT 3/8-16 z	X	X
76	12990031	NUT, TOPLOCK 3/8-16	X	X	X

CASTER PARTS

REF # PART # DESCRIPTION

LS LT SS REF # PART # DESCRIPTION

LS LT SS

1	98460013	L-S CASTER KIT W/O BRKT (SET OF 2)	X
1A	98460005	L-T CASTER KIT W/O BRKT (SET OF 2)		X
2	93460006	CASTER ADJUSTMENT BRACKET	X	X
3	98460016	L-S CASTER ARM (INCL 1-#20 & 2-#19)	X
3A	93460005	L-T CASTER ARM WELDMENT		X
4	93460008	L-S CASTER YOKE	X
4A	93460004	L-T CASTER YOKE		X
5	72460002	11X400-5 WHEEL ASSEMBLY COMPLETE	X	X
6	77460008	RIM ONLY	X	X
7	77460009	TIRE ONLY	X	X
8	98460019	BEARING KIT (2 EACH #9, #10, #11, #12)	X	X
9	77460004	WHEEL SPACER	X	X
10	77460005	GREASE SEAL	X	X
11	77460006	TAPERED ROLLER BEARING	X	X
12	77460007	RACE, FOR BEARING	X	X
13	VKWHLZERK	ZERK FITTING FOR WHEEL	X	X	X
14	11990034	BOLT, HEX HD 3/4-10 X 6 1/2 Z5	X	X
15	12990026	NUT, NYLOCK JAM 3/4-10	X	X
16	15990013	LYNCH PIN	X		X
17	13990023	MACHINE BUSHING 1 1/4 X 10 GA	X
18	13990022	C- SPACER	X
19	14990003	BRONZE BUSHING	X
20	15990006	ZERK FITTING FOR CASTER ARM	X		X
21	98460018	CASTER BOLT KIT(8 BOLTS, 8 NUTS, 16 WASH.)	X	X
22	11990030	BOLT, FLANGE 3/8-16 X 3/4 Z5	X	X	X
23	12990008	NUT, FLANGELOCK 3/8-16 Z	X	X	X
24	17460003	GREASE CAP		X
25	15990012	PIN, COTTER 1/8 X 2		X

26	12990023	NUT, CASTLE 3/4-14	X
27	77460002	TAPERED BEARING FOR PIVOT	X
28	77460003	BEARING RACE FOR PIVOT	X
29	77460001	GREASE SEAL	X
30	13990021	BUSHING, MACHINE 7/8 ID X 1 3/8 OD X 1/4	X
31	13990008	BUSHING, MACHINE 7/8 ID X 1 3/8 OD X 1/2	X
32	14990001	BUSHING, BRONZE(SAME AS VPIVOTBUSH)	X
33	98460002	S-S CASTER ARM (INCL 2 #32 AND 1 #20)	X
34	93460007	S-S CASTER YOKE	X
35	12990018	NUT, NYLOCK JAM 1/2-20	X
36	11990029	BOLT, HEX HD 1/2-20 X 5 Z5	X
37	13990019	BUSHING, MACHINE 3/4 X 1 1/4 X 14GA	X
38	13990018	BUSHING, MACHINE 3/4 X 1 1/4 X 10GA	X
39	72460003	9X350-4 PNEUMATIC WHEEL ASSEMBLY	X
40	VKRLBRG	ROLLER BEARING	X
41	VKBRGRTNR	ROLLER BEARING RETAINER	X
42	VKSPNNR	SPANNER	X
43	VKBRGKIT	CASTER BEARING KIT (INCL #40, #41, #42)	X

LOWER TRACTOR (48 - 52 - 61)

REF #	PART #	DESCRIPTION		REF #	PART #	DESCRIPTION
**1	51410009	ENGINE, KAWASAKI 15 HP RECOIL		51	16410001	SPRING, SMALL COMPRESSION
**1	51410005	ENGINE, KAWASAKI 17 HP RECOIL	52		98410027	NEUTRAL ADJUSTMENT KNOB W/ BOLT
**1	51410006	ENGINE, KAWASAKI 17 HP RECOIL/ELEC	53		12990022	NUT, NYLOCK JAM 1/2-13
**1	51410014V	ENGINE, KAWASAKI 19 HP ELECTRIC	54		72490001	WHEEL, PLASTIC, 5" X 2 3/4" W/ 5/8 BORE
**1	51410013V	ENGINE, KOHLER COMMAND 23 HP ELECTRIC	55		13990016	MACHINE BUSHING 5/8 ID 1 OD 14 GA
**1	51410010V	ENGINE, KAWASAKI 23 HP ELECTRIC	56		11990022	BOLT, SHOULDER ALLEN 5/8 X 2 3/4
**1	51410029V	ENGINE, KAWASAKI 25 HP ELECTRIC	57		11990024	SCREW, TRUSS HD MACHINE 1/4-20 X 3/4
2	36410003	OIL DRAIN VALVE, BALL VALVE TYPE	58		93410004	PULLEY GUARD PLATE
3	81410017	TUBE, OIL DRAIN	59		93410001	FOOT PLATFORM
4	15990002	CLIP, HALF 5/8"	60		12990018	NUT, NYLOCK JAM 1/2-20
5	35410018	OIL DRAIN VALVE ADAPTER (KAW ONLY) 0-ring NOT incl.	61		13990002	WASHER, FLAT USS 7/16 Z
6	35410017	COUPLING, BRASS, 3/8 NPT (KOHLER ONLY)	62		96410002	FOOT PLATE JOINT, ZINC PLATED
7	35410016	NIPPLE, BRASS, 3/8 NPT CLOSE (KOHLER ONLY)	63		11990011	BOLT, HEX 1/2-20 X 2 Z5
8	11990009	BOLT, HEX 5/16-24 X 1 1/2 Z5	64		93410009	TRACTOR FRAME WELDMENT
9	13990009	WASHER, FLAT USS 1/4 Z	65		93410014	Wheel Motor BRACKET, NOT Interchangable W/65A
10	12990011	NUT, LOCK FLANGE 5/16-24 Z		65A	93410018	Wheel Motor BRACKET, NOT Interchangable W/65
11	11990027	BOLT, HEX 5/16-18 X 1 Z5	66		12990009	NUT, LOCK FLANGE 7/16-14 Z
12	16460001	SPRING, EXTENSION	68		11990046	BOLT, FLANGE 3/8-16 X 1 Z8
13	12990007	NUT, LOCK FLANGE 5/16-18 Z	69		72410017	WHEEL HUB, HEAVY-DUTY CAST (INCLUDES 4 x #103)
14	11990012	BOLT, FLANGE 5/16-18 X 3/4 Z5	70		12990023	NUT, CASTLE 3/4-14
14A	11990043	BOLT, SHOULDER ALLEN 3/8 X 3/4	71		15990012	PIN, COTTER 1/8" X 2
15	11990030	BOLT, FLANGE 3/8-16 X 3/4 Z5	72		15990015	WOODRUFF KEY 3/16 X 3/4
16	93410007	BRAKE SHOE	73		32410001	HYDRO MOTOR (MF16) (INCL #70 & #72)
17	12990008	NUT, LOCK FLANGE 3/8-16		73A	32410002	HYDRO MOTOR (MF14) (INCL #70 & #72)
18	93410008	BRAKE/TRANS INTERLOCK COG (old-no spring used)	74		72410004	TURF TIRE ONLY 10" X 20" TURFMATE
18A	93410033	BRAKE/TRANS INTERLOCK COG (uses spring)		74A	72410011	TURF TIRE ONLY 10" X 20" TURFMASTER
19	Discontinued	BRAKE, LATERAL LINK BAR (Type without cog spring)	75		72410005	RIM ONLY 10" X 20" (ALL)
		SERIAL NUMBERS AFTER 12624 EQUIPPED WITH 19A	76		72410002	TIRE & RIM ASSEMBLY (TURFMATE)
		REPLACE WITH 19A & 2 EACH 14A, 97, 18A, 21, 101		76A	72410012	TIRE & RIM ASSEMBLY (TURFMASTER)
19A	93410017	BRAKE, LATERAL LINK BAR (Spring cog type)	77		72410001	NUT, LUG 1/2-20
20	93410005	TRIGGER, OPC	78		71410004	SETSCREW 5/16-18 X 3/8
21	13990010	WASHER, FLAT USS 5/16 Z	79		15990004	MACHINE KEY 5 MM X 5 MM X 25 MM
22	16410002	SPRING, LARGE COMPRESSION	80		71410003	PULLEY 5.45 OD x A GRV x 15MM
23	13990001	BUSHING, NYLON FLANGE	*81		71460001	BELT AX-50, FOR HYDRO PUMPS (USED W/ #84) see note*
24	52410001	SWITCH, OPC (GRAY), NORM. CLOSED		*81A	71460033	BELT AX-51, FOR HYDRO PUMPS (USED W/ #84A) NEW
24A	52410002	SWITCH, OPC (BLACK), NORM. OPEN	82		15990003	MACHINE KEY 1/4 SQ. x 1
25	93410011	BRACKET, OPC (WORKS WITH #24)	83		71460006	PULLEY, IDLER 4 1/2 x 1 x 3/8 BORE
25A	93410015	BRACKET, OPC (WORKS WITH #24A)	*84		71410002	PULLEY 4.5 OD x A GRV x 1" (see note below*)
26	13990005	WASHER, RUBBER 3/8		*84A	71410005	PULLEY 5 1/16" OD x A GRV x 1" NEW (see note below*)
27	13990004	WASHER, FENDER, 5/16 X 1 Z	85		71410001	CLUTCH/BRAKE (YELLOW WIRE SLEEVE)
28	85410009	THREADED ROD FOR OPC (BENT)	86		71410007	SPACER, FOR CLUTCH
29	15990007	HITCH PIN CLIP	87		11990010	BOLT, HEX 7/16-20 X 2 3/4 Z5
30	15990009	E-CLIP 1/2	88		11990006	BOLT, HEX 3/8-16 X 2 1/2 Z5
31	13990015	MACHINE BUSHING 1/2 ID 7/8 OD 18GA	89		93490001	IDLER ARM BASE
32	12990019	NUT, NYLOCK 1/4-20	90		14990001	BUSHING, BRONZE (SAME AS VELKE PIVOT BUSHING)
33	14990002	BUSHING, BRONZE(SAME AS VELKE HITCH BUSHING)	91		98490002	IDLER ARM W/ BUSHINGS (2 x #90)
34	98410006	RIGHT NEUTRAL ADJ LEV. W/ BUSHING (#33)	92		11990004	BOLT, HEX 3/8-16 X 1 1/2 Z5
35	98410007	LEFT NEUTRAL ADJ LEV. W/ BUSHING (#33)	93		13990017	MACHINE BUSHING 7/8 ID 1 3/8 OD 14 GA
36	98410008	PUMP CONTROL PIVOT BASE W/ BUSHING (#33)	94		12990020	NUT, NYLOCK 3/8-16
37	11990008	BOLT, EYE 1/4-20 Z	95		15990010	E-CLIP 7/8
38	11990002	BOLT, HEX 5/16-18 X 2 Z5	96		13990014	WASHER, LOCK 7/16 Z
39	11990019	BOLT, ALLEN 1/4-20 X 2	97		16410003	SPRING, TORSION FOR BRAKE SYSTEM
40	11990018	BOLT, ALLEN 10-32 X 2	98		36410004	FITTING, MALE BARB, STRT (KOHLER)
41	93410012	PUMP CONTROL HOOP, RIGHT	99		36410005	FITTING, MALE BARB, 90 DEG(BRIGGS & KAWASAKI)
42	93410010	PUMP CONTROL HOOP, LEFT	100		35410024	O-RING, FOR KAWASAKI OIL DRAIN ADAPTER
43	96410001	PUMP CONTROL CLAMP	101		12990021	NUT, NYLOCK 5/16-18
44	13990003	WASHER, FLAT SAE #10	102		16420002	SPRING, PUMP IDLER, NEW
45	12990016	NUT, NYLOCK 10-32	103		72410013	STUD, FOR TAPERED WHEEL HUB
46	11990025	SCREW, ROUND PHLP 1/4-20 X 2 Z	104		12990031	NUT, TOPLOCK 3/8-16
47	31490001	HYDRO PUMP	* 81/84		NOTE:	Serial # 12000+ have NEW / could be either if before #12000
48	11990017	BOLT, CARRIAGE, 7/16 X 1 Z5	**1		NOTE:	All engines include entire exhaust (shipped loose)

4911990013 BOLT, FLANGE 5/16-18 X 1 Z5

5012990006 NUT, LOCK FLANGE 1/4-20 Z

UPPER TRACTOR (48-52-61)

REF # PART # DESCRIPTION

198420006 RIGHT CNTRL LEV ASSEMBLY (INCL #3 x 2 & #6 x 2)

298420001 LEFT CNTRL LEV ASSEMBLY (INCL #3 x 2 & #6 x 2)

3	17420004	FOAM GRIP
4	15990009	E-CLIP 1/2

522420002 GROOVE PIN 1/2 X 19.9375 Z

614990002 BUSHING, BRONZE (SAME AS VELKE HITCH BUSHING)

6A	14990004 BUSHING, BRONZE ( 1/2" long) or use ref #6

713990015 MACHINE BUSHING 1/2 ID 7/8 OD 18GA

815990007 HITCH PIN CLIP #213

8A	15990025	HITCH PIN CLIP #3
9	85410022	CONTROL ROD X 26"

1018410002 SWIVEL END, 5/16-18

1193420006 INSTRUMENT PANEL, FOR SWITCH #19

11A	93420001 INSTRUMENT PANEL, FOR SWITCH #19A

1254420001 HOUR METER (INCLUDES RETAINER & HARDWARE)

1354420002 AMMETER (INCLUDES RETAINER AND HARDWARE)

1417420002 PLUG, PANEL 2", BLACK

1552460002 CHOKE CABLE, BRIGGS 20 HP & KAW. 17 HP (INCL NUT)

15A 52460001 CHOKE CABLE, KOHLER 22 HP (INCL NUT)

1617420005 PLUG, PANEL 3/8", BLACK

1711990023 SCREW, TRUSS HD MACH 10-32 X 1/2 Z

1820420002 IGN. SWITCH, ELEC START (INCL KEY AND HARDWARE)

18A	20420001	IGN. SWITCH, RECOIL (INCL KEY AND HARDWARE)
19	52420003	CLUTCH SWITCH, RED PUSH-PULL (INCL RETAINER)
19A	52420001	CLUTCH SWITCH, SILVER TOGGLE (INCL NUT)

2017420001 PLUG, PANEL 3", BLACK

2111990024 SCREW, TRUSS HD MACHINE 1/4-20 X 3/4 Z

2252420002 THROTTLE CABLE

2312990015 NUT, KEP 10-32

2453490004 WIRE HARNESS, DASH PANEL, ELECTRIC START

24A	53490002	WIRE HARNESS, DASH PANEL, RECOIL FOR SWITCH #19A
24B	53490015	WIRE HARNESS, DASH PANEL, RECOIL FOR SWITCH #19

2593420007 STATIONARY HANDLEBAR

2611990027 BOLT, HEX 5/16-18 X 1 Z5

2713990004 WASHER, LOCK 5/16 Z

2812990008 NUT, LOCK FLANGE 3/8-16

2911990030 BOLT, FLANGE 3/8-16 X 3/4 Z5

3098420002 CUSHION

3198410025 BATTERY STRAP (INCL #32 x 2 & #33 x 2)

3212990019 NUT, NYLOCK 1/4-20

3311990031 SCREW, ROUND PHLP 1/4-20 X 1 1/4 Z

3456410002 BATTERY CASE COVER AND BASE

3512990007 NUT, LOCK FLANGE 5/16-18 Z

3653490010 BATTERY CABLE, RED, 38" (INCL #38 x 2)

3711990012 BOLT, FLANGE 5/16 -18 X 3/4 Z5

3856410006 LUG INSULATOR, RED

3953490011 BATTERY CABLE, BLACK, 18 1/2"

4056410001 BATTERY, 12V, MAINT. FREE

4156410002 BATTERY CASE COVER AND BASE

4293410016 BATTERY STAND

REF # PART # DESCRIPTION

4311990021 BOLT, SHLDR ALLN 1/2 X 1 1/4

4498420003 PARKING BRAKE HANDLE ASSEMBLY (INCL #6 & #45)

4517420003 HANDLE GRIP FOR BRAKE

4691410003 ADJ BRAKE PUSH ROD (INCL #47 & #48)

48	12990014	YOKE END 3/8-24
49	21420001	CLEVIS PIN

5093420003 UPRIGHT WELDMENT

5112990020 NUT, NYLOCK 3/8-16

5212990012 NUT, U 1/4-20

5315990002 CLIP, HALF 5/8"

5491420002 HYDRO TANK *See note on Hydraulic Parts page

5591420001 HYDRO TANK CAP

5641410005 FUEL TANK (INCLUDES #61 & #62)

5741410002 FUEL TANK CAP W/ VENT

5811990025 SCREW, ROUND PHLP 1/4-20 X 2 Z

5991410002 FUEL TANK STRAP

6012990006 NUT, LOCK FLANGE 1/4-20 Z

6141410003 BUSHING FOR FUEL TANK VALVE

6241410004 VALVE, BALL 90DEGREE FOR FUEL TANK

6343410001 HOSE CLAMP, 1/4"

6481410012 FUEL LINE, 9"

64A	81410044 FUEL LINE, 34" (KOHLER ENGINE)

6593410006 FUEL TANK STAND

6611990001 BOLT, HEX 1/4-20 X 3/4 Z5

6811990013 BOLT, FLANGE 5/16-18 X 1 Z5

6953490013 RELAY, FOR HARNESS #73 (ELECTRIC)

69A	53490019	RELAY, FOR HARNESS #73B (RECOIL)
69B	53490020	CASE, FOR RELAY #69A

7034490001 HYDRO OIL FILTER HOUSING BLOCK

7134490002 HYDRO OIL FILTER 25 MICRON

7253490006 WIRE HARNESS, ENGINE (BRIGGS 20 HP)

72A	53490001	WIRE HARNESS, ENGINE (BRIGGS 16-18 HP)
72B	53490014	WIRE HARNESS, ENGINE (KAW 15 HP & 17 HP REC)
72C	53490017	WIRE HARNESS, ENGINE (KAW 17 HP R/E & 19/23 HP)
73	53490005	WIRE HARNESS, MAIN (ELECTRIC START)
73A	53490003	WIRE HARNESS, MAIN (RECOIL, NO RELAY)
73B	53490016	WIRE HARNESS, MAIN (RECOIL, W/ RELAY)
74	52410002	SWITCH, OPC, ELEC START (BLACK) NORM. OPEN
74A	52410001	SWITCH, OPC, RECOIL (GRAY) NORM. CLOSED

7512990042 NUT, HEX, 1/4-20 Z

7653490007 SOLENOID GROUNDING WIRE

7753490012 CABLE, RED, 3 1/2"

78 53490009 SOLENOID

7998420013 PUMP GUARD BAR (INCL. #80)

8017420006 FOAM FOR PUMP GUARD BAR

8113990010 WASHER, FLAT 5/16 Z