Description | Scag Power Equipment STT-31EFI-SS guide

Section 8 61V & 72VS CUTTER DECKS

Ref.	Part No.	Description	61	72
No.	Part No.	Description	61	72
No.
1	481625-01	Wing Nut, 3/8-16	X	X
2	424325	Belt Cover	X
	422708	Belt Cover RH		X
	422677	Belt Cover LH		X
3	04001-172	Bolt, Hex Head 1/4-20 x 1”	X	X
		Grd 8	X	X
4	04020-09	Nut, 5/8-11 UNC	X	X
5	48926	Tapered Hub, 1-1/8” Bore	X	X
6	04041-07	Flatwasher, 3/8” (.391 x .938
		x .105)	X	X
7	04021-09	Nut, Hex Elastic Stop 3/8-16	X	X
8	48141	Tapered Hub, 1” Bore	X	X
9	04063-0	Key, 1/4 x 1/4 x 1-1/4”	X	X
10	482746	Pulley, 6.75 O.D.	X
	482745	Pulley, 6.35 O.D.		X
11	482745	Pulley, 6.35 O.D.	X
	482747	Pulley, 6.95 O.D.		X
12	483215	Pulley, Idler	X	X
13	481558	Belt, Cutter Deck Drive	X
	481980	Belt, Cutter Deck Drive		X
14	48114-04	Grease Fitting	X	X
15	461516	Pusharm (incl. items 14, 16,
		& 18)	X	X
16	04020-16	Nut, Hex Head 5/8-18 UNF	X	X
17	04021-13	Nut, Hex Elastic Stop 5/8-11	X	X
18	48763	Rod End, 5/8” Male RH
		Thread	X	X
19	04001-79	Bolt, Hex Head 5/8-11 x
		4-1/2”	X	X
20	04019-03	Nut, Hex Serrated Flange
		5/16-18	X	X
21	451240	Push Arm Shaft	X	X
22	45944	Roller Shaft	X	X
23	04001-12	Bolt, Hex Head 5/16-18 x
		1-3/4”	X	X
24	48038	Wheel, Anti-Scalp	X	X
25	461663	Spindle Assembly	X	X
26	43589	Spindle Shaft	X	X
27	481024	Seal, Top	X	X
28	43644	Spindle Housing	X	X
29	43312	Spacer, Outside	X	X
30	481022	Bearing Assembly	X	X
31	481025	Seal, Bottom	X	X
32	481035	Nut, Special 1-1/16-18	X	X
33	43297	Spindle Bushing, Bottom	X	X
34	43296	Spacer, Inside	X	X
35	48677	Relief Fitting, Tapered
		Spindle	X	X
36	483176	Wear Pad	X
	483174	Wear Pad		X
37	04040-04	Flatwasher, 5/16”	X	X
38	04021-04	Nut, Center Lock 5/16-18	X	X
39	04063-08	Key, 1/4 x 1/4 x 2”	X	X
40	04043-06	Flatwasher, 5/8” Hardened	X	X
41	04001-41	Bolt, Hex Head 5/8-11 x
		9-1/2”	X	X
42	482879	Cutter Blade, 21”	X
	482882	Cutter Blade, 24.5”		X
	43590	Spacer, Spindle Bottom	X	X
43	04001-176	Bolt, Hex Head 5/16-18 x
44		1-3/4”	X	X

Ref.	Part No.	Description	61	72
No.	Part No.	Description	61	72
No.
45	424841	Baffle, Custom Cut 61V	X
	424917	Baffle, Custom Cut 72V		X
46	04003-23	Bolt, Carriage 3/8-16 x 1”	X	X
47	424209	Discharge Baffle 61V	X	X
	424856	Discharge Baffle 72V	X	X
48	04021-22	Nut, Hex Elastic Stop
		5/16-18 Grd 8	X	X
49	482295	Wheel, Anti-Scalp	X	X
50	48100-15	Bushing, .376 I.D. Oilite	X	X
51	481632	Anti-Scalp Wheel	X	X
52	04021-05	Locknut, 3/8-16 Center Lock	X	X
53	422478	Anti-Scalp Wheel Bracket	X	X
54	04003-26	Bolt, Carriage 3/8-16 x 4”	X	X
55	04017-27	Bolt, Hex Serrated Flange
		3/8-16 x 1”	X	X
56	04110-03	U-Nut, 3/8-16	X	X
57	04019-04	Nut, Hex Serrated Flange
		3/8-16	X	X
58	04001-20	Bolt, Hex Head 3/8-16 x
		1-1/2”	X	X
59	04001-54	Bolt, Hex Head 3/8-16 x 3”	X	X
60	43503	Pivot, Idler - Short	X	X
61	48224	Bearings, Ball	X	X
62	483704	Spring, Cutter Deck	X	X
63	04043-04	Flatwasher,3/8-.39 x .938 x
		.105 HD	X	X
64	04001-136	Bolt, Hex Head 3/8-16 x
		1-1/2” Grd 8	X	X
65	461842	Idler Arm, Cutter Deck	X	X
66	04003-12	Bolt, Carriage 5/16-18 x 3/4”	X	X
67	04021-10	Nut, Elastic Stop 5/16-18	X	X
68	424798	Mounting Plate, RH Gearbox	X	X
69	482486	Gearbox Assembly, Deck
		Drive	X	X
70	43763	Spacer, Gearbox Mount	X	X
71	424799	Mounting Plate, LH Gearbox	X	X
72	04001-154	Bolt, Hex Head 5/16-18 x
		4-3/4”	X	X
73	04030-03	Lockwasher, 5/16”	X	X
74	04040-15	Flatwasher, 5/16” (.375 x
		.875 x .083)	X	X
75	04021-11	Nut, Elastic Stop 7/16-14	X	X
76	04003-12	Bolt, Carraige 5/16-18 x 3/4”	X	X
77	04040-11	Flatwasher, 7/16-.500 x 1.25
		x .083	X	X
78	04001-62	Bolt, Hex Head 3/8-16 x
		3-1/4”	X	X
79	04003-40	Bolt, Carriage 7/16-14 x
		1-1/4”	X	X
80	483167	Bolt, Deck Adjust	X	X
81	461929	Lever Assy, Deck Level (Incl.
		80)	X	X
82	461863	Cutter Deck 61 V w/Decals	X
	462144	Cutter Deck 72 V w/Decals		X
83	483378	Spring, Discharge Chute	X	X
84	461846	Discharge Chute 61V	X
	462132	Discharge Chute 72V		X
85	04001-108	Bolt, Hex Head 5/16-18 x
		4-1/2”	X	X

STT-31EFI-SS specifications

Scag Power Equipment is renowned for producing high-quality commercial mowing equipment, and the STT-31EFI-SS stand-on mower is no exception. Designed with professional landscapers in mind, the STT-31EFI-SS offers a perfect blend of power, efficiency, and maneuverability.

One of the standout features of the STT-31EFI-SS is its 31 hp EFI (Electronic Fuel Injection) engine. This powerhouse engine not only delivers impressive power but also enhances fuel efficiency. The EFI technology ensures that the engine operates at optimal performance by automatically adjusting the air-to-fuel ratio under varying conditions. This results in smoother starts, improved throttle response, and reduced emissions, making the mower both environmentally friendly and cost-effective in the long run.

The STT-31EFI-SS features a durable construction built to withstand the rigors of commercial use. Its robust steel frame and heavy-duty components are designed for maximum longevity. Moreover, the mower is equipped with Scag's cutting-edge Hydro-Gear ZT-3400 transmission, which offers exceptional speed and agility. This transmission allows operators to navigate tight spaces with ease and provides a top speed of up to 10.5 mph, making it ideal for large properties or demanding mowing tasks.

Operator comfort is another key aspect of the STT-31EFI-SS. The stand-on design promotes better visibility and quick maneuverability, enabling operators to navigate obstacles with confidence. The padded operator platform and adjustable controls ensure a comfortable experience, even during extended use. Additionally, the mower’s low center of gravity enhances stability on slopes and uneven terrain.

One of the most notable characteristics of the STT-31EFI-SS is its advanced cutting deck. The mower features a 48", 52", or 61" Velocity Plus cutting deck, which is known for delivering a superior cut and impressive grass dispersal. The deck is engineered for optimal airflow, enabling precision mowing while preventing clumping. This technology ensures that grass clippings are evenly distributed, resulting in a healthier lawn appearance.

In conclusion, the Scag STT-31EFI-SS stand-on mower integrates powerful performance, innovative engineering, and comfort. Featuring a reliable EFI engine, robust construction, and exceptional maneuverability, this mower stands out as an excellent choice for professional landscapers seeking efficiency and reliability in their equipment.