Manuals+

Illustrated Parts List

Model 390 Series

This document provides a detailed breakdown of parts for the MTD Model 390 Series tiller, including diagrams and a comprehensive list of components with their respective part numbers and descriptions.

Diagram Overview

The diagrams illustrate the assembly of the tiller, showing the arrangement of various components such as the handle assembly, frame, engine mounting, drive system, and tines. Each part is identified by a reference number, which corresponds to its listing in the parts tables below.

Page 1 Diagram: This illustration displays the primary structure of the tiller, including the upper handle assembly with grips and controls, the main frame, the depth bar, and the wheel hanger bracket. It shows how these major sections connect.

Page 3 Diagram: This view focuses on the engine and drive train. It highlights the Honda engine, various pulleys, the chain case assembly, and the belt drive system, illustrating their placement and connection points.

Parts List - Page 2

Ref. Part No. Part Description
1712-0442Acorn Lock Nut 1/4-20
2736-3020Flat Washer.271" I.D. x.630" O.D.
3720-0270AReverse Handle Grip
4731-1600Handle Cover w/o throttle
5710-0779ATruss Mach. Scr. #10 x 1/2" Lg.
6720-0274Handle Grip
7712-3006Hex Nut 1/4-20 Gr.2
8726-0135Cap Speed Nut
9686-0083Clutch Handle Assembly
10720-0269Clutch Grip
11710-0641Hex Bolt 1/4-20 x 2.25" Lg. Gr.5
12731-1645AClutch Handle Holder
13736-0140Flat Washer.385" I.D. x.62" O.D.
14686-0014AReverse Handle Ass'y
15736-0264Flat Washer.344" I.D. x.62" O.D.
16649-04040Handle Assembly Comp.
19749-1401Handle Brace
20736-0921Lock Washer 1/2
21710-3194Hex Bolt 1/2-20 Gr. 5
22786-0005Depth Bar
23714-0149BCotter Pin
24712-04063Hex Flange L-Nut 5/16-18 Thd. Gr.5
25786-0003Tail Piece Bracket (L.H.)
26786-0004Tail Piece Bracket (R.H.)
27711-0415Clevis Pin
28710-0805Hex Bolt 5/16-18 x 1.5" Lg.
29710-0189Hex Bolt 5/16-18 x 3" Lg.
30736-0242Wash. Bell.340" I.D. x.872" O.D.
31711-1036ASpec. Hex Nut
32736-0119L-Wash. 5/16" I.D.
33710-3008Hex Bolt 5/16-18 Gr. 5
34786-0129Cable Guide Bracket
35710-0604AHex Washer Screw 5/16-18 x.62" Lg.
36710-0602Hex Wash. Hd. TT-Tap Scr.
37738-0934Shdl. Bolt 5/16-18
38786-0138AFrame (R.H.)
39786-0139AFrame (L.H.)
40736-0171Lock Washer 7/16
41712-0240Jam Nut 7/16-20 Gr. 2
42710-0176Hex Bolt 5/16-18 x 2.75" Lg.
43712-0429Hex Nylon Nut 5/16-18 Thd.
46686-0081AWheel Hanger Bracket Assembly
47734-1781Wheel Ass'y 8" x 1.75”(Plastic)
47734-1566Wheel Ass'y 8” x 1.75" (Steel)
48738-0929Shoulder Screw.496 I.D. x 1.445 O.D.
49750-0890Spacer
50710-1236Carr. Bolt 5/16-18 x 1
51736-0242Bell. Wash.34" I.D.
52720-0195Hand Knob
53750-0470Spacer

Parts List - Page 4

Ref. Part No. Part Description
1712-0392Hex L-Stop nut 1/4-28
2736-3020Flat Wash.266" I.D. x.625" O.D.
3710-0599Hex Washer TT-Tap Scr. 1/4-20 x.5"
4711-0920Belt Cover Bolt
5712-04063Hex Flange Top L-Nut 5/16-18
6710-0723Hex Hd. Scr. 3/8-16 x 1.25" Lg.
7756-0313Flat Idler Pulley 2.12” O.D.
8786-0149Idler Belt Keeper
9786-0144Idler Bracket
10712-0266Hex Cent. Jam Nut 3/8-16 Thd.
11786-0057Belt Cover
13786-0043ATine Shield
14710-3008Hex Hd. Cap Scr. 5/16-18 x.75” Lg
16686-0091Chain Case Assembly Complete
17686-0106Outer Disc Plate Assembly
18714-0149BInternal Cotter Pin
19711-0415Clevis Pin
20642-0023Outer Tine Assembly L.H.
21642-0024Outer Tine Assembly R.H.
22642-0003Inner Tine Assembly L.H.
23642-0002Inner Tine Assembly R.H.
24746-0918Forward Clutch Cable
25746-0953Reverse Clutch Cable
26756-0585Fl-Pulley 6" Dia.
27750-0892Spacer.64" Dia. x 2.4" Lg.
28748-0350Pulley Mounting Adapter
29736-0112Bell-Wash.525" I.D. x 1.5" O.D.
30712-3029Hex Jam Nut 1/2-20 Thd.
31732-0697Return Spring
32786-0040BReverse Bracket
33736-0119Lock Washer 5/16
34710-0237Hex Bolt 5/16-24 x.625"
35756-0971Engine Inner Half Pulley
36756-0600Reverse Engine Pulley
37736-0452Bell Washer.396" I.D. x 1/14" O.D.
38710-1093Hex Bolt 3/8-24 x 1.00"
39686-0013Reverse Arm Assembly
40786-0041Reverse Belt Keeper
41710-0502AHex L-Wash. TT-Tap 3/8-16 x 1.25"
42786-0145AEngine Plate
43786-0053Tine Shield Bracket
44736-0171L-Wash. 7/16" I.D.
45712-0240Hex Nut 7/16-20 Thd.
46754-0428V-Belt (Forward) 1/2 x 41.9”
47754-0429V-Belt (Reverse) 3/8 x 45.68"
48738-0102Shld. Screw.498 x 1.445
49738-0930Shld. Screw.560 x.165
50710-0805Screw 5/16-18 x 1.50
51712-3010Hex Nut 5/16-18
52736-0242Bell Washer

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