This document provides a parts list and descriptions for a Massey Ferguson 1020 tractor with a hydrostatic transmission. It includes over 50 parts related to the engine cylinder block and oil pan, camshaft and timing gears, pistons and connecting rods, crankshaft and flywheel, cylinder head, and lubricating system. The parts are numbered and include the part number, quantity, and brief description for each component.

1. Massey Ferguson
1020 TRACTOR (HYDRO. TRANSMISSION) 651576
TABLE OF CONTENT Page00-00

2. 1020 TRACTOR (HYDRO. TRANSMISSION)
49
9
21
120
39 3013
3348
37 3
3
38
15
5
34
14
17
40 41
41 32 7
7
16
6
4 22
19
18
23
31
43
36
42
35
47 45
4446
11
12
2
8
10
Ref 2 Page 2

3. Massey Ferguson
1020 TRACTOR (HYDRO. TRANSMISSION) 651576
CYLINDER BLOCK AND OIL PAN Page2
Item Part Number Qty Description
3439700M92 1 Engine Assembly (Complete)
3439695M91 1 Short Block Assembly
1 3435135M91 1 Block Assembly
2 3605087M1 8 (A) Bolt, Bearing Cap (M11 - 1.25 x 61MM Hex.)
3284003M1 8 (B) Bolt, Bearing Cap (M11 - 1.25 x 60MM Hex.)
3 3284004M1 2 Pin, Dowel
4 3284006M1 1 Shaft, Idler Gear
5 3284005M1 1 Plug (55MM Diag.)
6 3280498M1 1 Adapter, Oil Dipstick
7 3283891M1 4 Plug (1/8" P.T.)
8 3280120M1 2 Plug (14MM Dia.)
9 3280121M1 3 Plug (40MM Dia.)
10 3435137M1 2 Stud
11 3435018M1 1 Stud (M8 - 1.5 x 55MM)
12 3284847M1 1 Stud (M8 - 1.5 x 40MM)
13 3284846M1 4 Stud (M8 - 1.5 x 22MM)
14 3284845M1 1 Stud (M8 - 1.5 x 20MM)
15 1440690X1 2 Pin (10 x 22MM Dowel)
16 3283991M1 2 Pin, Dowel (Front)
17 3435645M1 2 Pin, Dowel (Rear)
18 3284001M1 1 Bearing, Camshaft (Front)
19 3284002M1 2 Bearing, Camshaft (Rear)
20 3436695M1 1 Gasket
21 3435416M1 1 Bolt (M10 - 1.25 x 14MM Hex. Hd.)
22 3437358M1 1 Stud (M8 - 1.5 x 60MM)
23 3605088M1 1 (A) Bolt, (M11-1.25 x 61MM Hex W/M10-1.25 Stud)
3437341M1 1 (B) Bolt, (M11 - 1.25 x 60MM Hex., W/M10-1.25 Stud)
30 3283980M1 1 Guide, Cable
31 3283981M1 4 Seal, Bearing Cap
32 3283982M1 1 Bolt, Lock
33 3283983M1 1 "O" Ring, Guide
34 3283984M1 1 Gear, Cable Drive
35 3435134M1 1 (C) Dipstick, Oil Level Indicator
36 3283985M1 1 (D) Dipstick Gauge, Oil Level
37 3283986M1 1 Cover
38 3283987M1 1 Gasket, Cover
39 3283988M1 1 Connector, Drain Hose
40 3283978M1 1 Bolt (M6 - 1.0 x 10MM)
41 3283538M1 2 Gasket, Bolt
42 3435138M92 1 Pan Assembly, Oil
43 3283491M1 1 Gasket, Oil Pan
44 3280104M1 1 Plug, Drain (Magnetic)
45 3280105M1 1 Gasket, Drain Plug
46 1440711X1 16 Bolt (M8 - 1.25 x 16MM Hex., Hd)
47 353446X1 16 Washer (5/16" Lock)
48 339560X1 2 Bolt (M6 - 1.0 x 16MM Hex.)
49 353441X1 2 Washer (1/4" Lock)
****************************************
(A) - Used 2WD Tractor Serial Number
02414 And Up.
- Used 4WD Tractor Serial Number 41837
And Up.
(B) - Used Prior To 2WD Tractor Serial
Number 02414.
- Used Prior To 4WD Tractor Serial
Number 41837.
(C) - Used Late Produciton Tractors.
(D) - Used Early Produciton Tractors.

4. 1020 TRACTOR (HYDRO. TRANSMISSION)
1
3
49
8
2
7
156
1614
28
18
17
38
39 43
30 32
35
29
33 37
37
26
44
44
45
45
45
45
45
46
46
31
2747
3424
25
41
36
40
5
42
Ref 5 Page 5

5. Massey Ferguson
1020 TRACTOR (HYDRO. TRANSMISSION) 651576
CAMSHAFT, TIMING GEAR Page5
Item Part Number Qty Description
1 3283523M1 1 Camshaft, Engine
2 3283524M1 1 Gear, Camshaft
3 3283525M1 1 Key, Camshaft Gear
4 3283526M1 1 Plate, Camshaft Thrust
5 3280148M1 1 Washer, Thrust
6 1442558X1 1 Bolt (M10 - 1.25 x 35MM Hex.)
7 339376X1 1 Washer (M10 Lock)
8 390379X1 2 Bolt (M8 - 1.25 x 18MM Hex.)
9 353446X1 2 Washer (5/16" Lock)
14 3283864M91 1 Gear Assembly, Idler
15 3284006M1 1 Shaft, Idler Gear
16 3283868M1 1 Spacer, Idler Gear
17 3283863M1 1 Ring, Gear Retaining
18 3283865M1 AR Washer, Thrust (1.8MM)
3283866M1 AR Washer, Thrust (2.0MM)
3283867M1 AR Washer, Thrust (2.3MM)
24 3283882M91 1 Cover Assembly, Timing Gear
25 3283885M1 1 Seal, Front Oil
26 3283886M1 2 Bearing, Needle
27 3283884M1 2 Stud (M8 - 1.5 x 30MM)
28 3283877M1 1 Plate, Cover (Front)
29 3283883M1 1 Plate, Screen
30 3283878M1 1 Housing, Bearing
31 3283879M1 1 Gear, Pump Drive
32 3283880M1 AR Washer, Adjusting (0.3MM)
3283881M1 AR Washer, Adjusting (0.5MM)
3284638M1 AR Washer, Adjusting (0.1MM)
33 3283873M1 1 Gasket, Front Plate
34 3283874M1 1 Gasket, Gear Case
35 3283875M1 1 Gasket, Bearing Housing
36 3283876M1 1 Plate, Timing
37 3283872M1 5 Bolt W/Lock (M8 - 1.25 x 28MM Hex. Hd.)
38 390379X1 6 Bolt (M8 - 1.25 x 18MM Hex.)
39 353446X1 6 Washer (5/16" Lock)
40 339168X1 4 Bolt (M8 - 1.25 x 50MM Hex.)
41 339368X1 1 Bolt (M8 - 1.25 x 60MM Hex.)
42 339123X1 2 Bolt (M8 - 1.25 x 20MM Hex.)
43 353446X1 2 Washer (5/16" Lock)
44 1440203X1 3 Nut (M8 - 1.25 Hex.)
45 353446X1 8 Washer (5/16" Lock)
46 339064X1 2 Bearing, Ball
47 339291X1 1 Bolt (M8 - 1.25 x 55MM Hex.)

6. 1020 TRACTOR (HYDRO. TRANSMISSION)
2
3
51
4 614
11
15
13
12
20
21
18
22
32
37
23
36 31 30
39
40
40
41
41
33
35
43
34
38
42
Ref 6 Page 6

7. Massey Ferguson
1020 TRACTOR (HYDRO. TRANSMISSION) 651576
PISTONS, CONNECTING RODS, CRANKSHAFT AND FLYWHEEL Page6
Item Part Number Qty Description
1 3435663M1 3 Piston (Std.)
3435604M1 3 Piston (+.50MM)
2 3435145M1 3 Pin
3 3435605M91 3 Ring Set, Single Piston (Std.)
3435606M91 3 Ring Set, Single Piston (+.50MM)
4 3283499M1 6 Bearing, Connecting Rod (Standard)
3284635M1 6 Bearing, Connecting Rod (-.25MM)
3284636M1 6 Bearing, Connecting Rod (-.50MM)
5 3283500M91 3 Rod Assembly, Connecting
6 3283503M1 6 Bolt, Connecting Rod
11 3435146M91 1 Crankshaft Assembly
12 3283512M1 1 Gear, Crankshaft
13 3280001M1 2 Key, Crankshaft
14 3280931M1 1 Pin, Dowel
15 3284626M91 1 Bearing Kit, Main (Std.)
3284627M91 1 Bearing Kit, Main (-.25MM)
3284628M91 1 Bearing Kit, Main (-.50MM)
18 3284629M91 1 Flange Kit, Thrust (Standard)
3284630M91 1 Flange Kit, Thrust (+.25MM)
3284631M91 1 Flange Kit, Thrust (+.50MM)
20 3283505M1 1 Pulley, Crankshaft
21 3280140M1 1 Washer (23 x 46 x 5MM Flat)
22 1440218X1 1 Nut (M12 - 1.5 Hex.)
23 3280974M1 4 Plug (16MM Dia.)
3435148M91 1 Flywheel Assembly
30 3435646M1 1 Bearing, Flywheel Pilot
31 3283516M1 1 Ring Gear, Flywheel
32 3283514M1 3 Pin, Dowel
33 3284011M91 1 Cover Assembly, Oil Seal
34 3283518M1 1 Seal, Rear Oil
35 3284012M1 1 Gasket, Oil Seal Cover
36 3284013M1 1 Plate, Flywheel (Rear)
37 1441302X1 4 Bolt (M10 - 1.25 x 30MM Hex.)
38 339337X1 1 Bolt (M8 - 1.25 x 30MM Hex. Hd.)
39 391931X1 4 Bolt (M8 - 1.25 x 25MM Hex.)
40 390972X1 5 Washer (8.4 x 17 x 1.6MM Flat)
41 353446X1 5 Washer (5/16" Lock)
42 1441134X1 6 Bolt (M10 - 1.25 x 25MM Hex.)
43 339376X1 6 Washer (M10 Lock)

8. 1020 TRACTOR (HYDRO. TRANSMISSION)
24
2627
2832
25
31
30
15
21
21 10
10
3
4
4
19
19 8
8
20
20
22 6
6
1
2
37
37
41
41
50
50
1817 49
49
3914
51 40
16
44
43 43
45
45
48
36
23
29
46
42
38
Ref 9 Page 9

9. Massey Ferguson
1020 TRACTOR (HYDRO. TRANSMISSION) 651576
CYLINDER HEAD Page9
Item Part Number Qty Description
1 3435114M91 1 Head Assembly
2 3435117M1 3 Insert, Chamber
3 3280312M1 6 Plug (20MM Dia. Cup Type)
4 3280121M1 2 Plug (40MM Dia.)
5 3283891M1 1 Plug (1/8" P.T.)
6 3283950M1 4 Stud (M8 - 1.5 x 65MM)
8 3435118M1 2 Stud, Cylinder Head
9 3283952M1 2 Stud (M8 x 1.25 x M10 x 1.25 x 95MM)
10 3280674M1 2 Plug (16MM Dia.)
14 3435113M1 1 Gasket, Head
15 3283938M1 8 Bolt (M12 - 1.5 x 88MM Lg.)
16 3283939M1 3 Bolt (M10 - 1.25 x 85MM Lg.)
17 3435109M1 3 Valve, Intake
18 3435110M1 3 Valve, Exhaust
19 3435111M1 6 Spring (Outer)
20 3435112M1 6 Spring (Inner)
21 3283935M1 6 Retainer, Valve Spring
22 3283936M1 6 Seal, Valve Stem
23 3435119M91 1 Cover Assembly
24 3283943M1 1 Cap, Oil Filler
25 3280071M1 1 Gasket, Cylinder Head Cover
26 3283940M1 1 Hose, Breather
27 3283941M1 1 Clamp Breather Hose
28 3280072M1 2 Washer
29 3005908X1 2 Nut (M8 - 1.25 Acorn)
30 3280023M1 12 Lock, Valve Spring
31 3284128M1 3 Glow Plug, Engine
32 3284129M1 2 Plate, Plug Connecting
3283527M91 1 Rocker Assembly Valve
36 3283529M91 1 Shaft Assembly, Rocker Arm
3283530M91 6 Arm Assembly, Rocker
37 3283536M1 1 Arm, Rocker
38 3283537M1 1 Screw, Rocker Arm Adjusting
39 1440203X1 1 Nut (M8 - 1.25 Hex.)
3283531M91 1 Bracket Assembly, Support (Rear)
40 3283539M1 1 Bracket, Support (Rear)
41 3283540M1 1 Bolt, Bracket (Lock)
42 3283538M1 1 Gasket, Bolt
43 3283532M1 2 Bracket, Suppport (Front)
44 3283533M1 2 Spring, Rockershaft
45 1441970X1 4 Ring, Ext. Snap (19MM Nom. x 1.2MM Thk.)
46 3435150M1 6 Rod, Push
47 1441409X1 2 Nut (M10-1.25 Hex.)
48 3280145M1 6 Lifter, Valve
49 390734X1 2 Washer (10.5 x 21 x 2MM Flat)
50 339376X1 2 Washer (M10 Lock)
51 3437309M1 1 Bolt (M10 - 1.25 x 60MM Hex. Hd.)

10. 1020 TRACTOR (HYDRO. TRANSMISSION)
34
11
24 17
15
13
12
3
23
16
1010
10
1
27 20
20
20
21
21 14 19
19
19
2
6
257
30
228
9
4
31
28
26
33
32
29
5 18
Ref 10 Page 10

11. Massey Ferguson
1020 TRACTOR (HYDRO. TRANSMISSION) 651576
LUBRICATING SYSTEM Page10
Item Part Number Qty Description
3284123M91 1 Kit, Oil Pump
1 3283924M1 1 Bolt W/Flat (M7 - 1.0 x 20MM)
2 3283925M1 1 Bolt W/Flat (M6 - 1.0 x 35MM)
3 3283926M1 1 Gasket, Oil Pump (0.1MM)
4 3283927M91 1 Cover Assembly, Oil Pump
5 3283894M1 1 Cover, Oil Pump
6 3283892M1 1 Valve, Relief
7 3283893M1 1 Spring, Relief Valve
8 3280194M1 1 "O" Ring, Oil Control Housing
9 3280193M1 1 Bolt (M14 - 1.5 x 12MM Hex.)
10 3283891M1 2 Plug (1/8" P.T.)
11 3283928M91 1 Pump Assembly, Oil
12 1 Body, Oil Pump (Order 3605202M91)
13 1 Shaft, Pump (Order 3605202M91)
14 1 Rotor Set (Order 3605202M91)
15 3283929M1 1 Gear, Oil Pump Driven
16 3280184M1 1 Pin, Rotor (Dowel)
17 3283930M1 1 Pin, Rotor (Dowel)
18 339291X1 2 Bolt (M8 - 1.25 x 55MM Hex.)
19 3284119M1 1 Bolt (M8 - 1.25 x 70MM Hex. Hd.)
20 390972X1 AR Washer (8.4 x 17 x 1.6MM Flat)
21 353446X1 AR Washer (5/16" Lock)
22 3435171M1 1 Oil Filter
23 3284120M1 1 Switch, Oil Pressure
24 3284121M1 1 Gasket, Oil Pump
25 1440203X1 1 Nut (M8 - 1.25 Hex.)
26 3437340M1 1 Bracket, Oil Screen
3437332M91 1 Screen Assembly, Oil (Part Number For Reference Only, Order Components)
27 3437333M1 1 Pipe, Oil Screen
28 3437334M1 1 Nut (M18 - 1.5MM Hex., Special)
3437335M91 1 Chamber Assembly, Oil Screen (Part Number For Reference Only, Order Components)
29 3437404M1 2 Screw W/Lock (M5 0 0.8 x 14MM Pad Hd. Machine)
30 3437336M1 1 Chamber, Oil Screen
31 3437337M91 1 Screen Assembly, Oil Chamber
32 1441409X1 1 Nut (M10-1.25 Hex.)
33 339376X1 1 Washer (M10 Lock)
34 3284034M1 1 Bolt (M8 - 1.25 x 12MM Hex. Hd.)

12. 1020 TRACTOR (HYDRO. TRANSMISSION)
18
2
1
4
3
5
8 6
7
22
23
23
2519
24
21
20
26
28
Ref 13 Page 13

13. Massey Ferguson
1020 TRACTOR (HYDRO. TRANSMISSION) 651576
GASKET KITS Page13
Item Part Number Qty Description
3435603M91 1 Gasket Kit, Upper Overhaul
1 3435113M1 1 Gasket, Head
2 3284113M1 1 Gasket, Water Inlet
3 3283959M1 1 Gasket, Muffler
4 3435122M1 1 Gasket, Intake Manifold
5 3435125M1 3 Gasket, Exhaust Manifold
6 3280025M1 3 Gasket, Fuel Injector
7 3280071M1 1 Gasket, Cylinder Head Cover
8 3284112M1 1 Gasket, Water Outlet
3284625M91 1 Gasket Kit, Lower Overhaul
18 3284012M1 1 Gasket, Oil Seal Cover
19 3283873M1 1 Gasket, Front Plate
20 3283874M1 1 Gasket, Gear Case
21 3283491M1 1 Gasket, Oil Pan
22 3280105M1 1 Gasket, Drain Plug
23 3284121M1 1 Gasket, Oil Pump
24 3284084M1 1 Gasket, Water Pump
25 3284082M1 1 Gasket, Water Pump Cover
26 3283987M1 1 Gasket, Cover
27 3280194M1 1 "O" Ring, Oil Control Housing
28 3283875M1 1 Gasket, Bearing Housing

14. 1020 TRACTOR (HYDRO. TRANSMISSION)
15
13 14
16
7
7
18
3 17
38
2
10
10
11
9
56
37
4
2327
3231 26
26 26
2930
33
34
35
36
8
28
12
Ref 14 Page 14

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16. Massey Ferguson
1020 TRACTOR (HYDRO. TRANSMISSION) 651576
RADIATOR Page14
Item Part Number Qty Description
2 3437960M1 1 Radiator
3 3280783M1 1 Cap, Radiator
4 3435612M1 1 Hose, Radiator Overflow
5 3435166M1 1 Shroud
6 3437959M91 1 Screen Assembly
7 364125X1 3 Clamp, Hose
8 3435160M1 1 Hose
9 3435757M1 1 Hose, Radiator "Upper"
10 832713M1 1 Clamp, Hose (Type F)
11 3435167M1 1 Pad, Radiator (Upper)
12 3438299M1 1 Seal, Left
13 3438298M1 1 Seal, Right
14 3437959M91 1 Screen Assembly
15 3437393M1 1 Seal, Air Pipe Guide
16 1440711X1 4 Bolt (M8 - 1.25 x 16MM Hex., Hd)
17 353446X1 4 Washer (5/16" Lock)
18 390972X1 4 Washer (8.4 x 17 x 1.6MM Flat)
23 3435294M1 2 Seal
26 3284093M1 4 Clamp, Drain Hose
27 3436681M1 1 (A) Hose, Drain to Block (11")
3435764M1 1 (B) Hose, Drain to Block (12-19/32")
28 3284091M1 1 Hose, Block Drain
29 3284023M1 1 Guard, Hose Protector
30 3284102M1 1 Valve, Drain
31 3284097M1 1 Plug, Water Drain
32 3284098M1 1 "O" Ring, Drain Plug
33 391931X1 1 Bolt (M8 - 1.25 x 25MM Hex.)
34 3280543M1 1 Washer, External Tooth Lock
35 353446X1 1 Washer (5/16" Lock)
36 1440203X1 1 Nut (M8 - 1.25 Hex.)
37 3438191M1 1 Seal, Lower Radiator
38 3436679M1 1 Pad
****************************************
(A) - Used 2WD Tractor Serial Number
02314 And Up.
- Used 4WD Tractor Serial Number 41685
And Up.
(B) - Used Prior To 2WD Tractor Serial
Number 02314.
- Used Prior To 4WD Tractor Serial
Number 41685.

17. 1020 TRACTOR (HYDRO. TRANSMISSION)
26
2
31
4
13
13
5
14
7
10
27
9
28
12
316
308
11
23
21
29
38
38
37
37
37
22
32
41
2445
45
20
46
43 40 25
3935
36
44
42
Ref 17 Page 17

18. Massey Ferguson
1020 TRACTOR (HYDRO. TRANSMISSION) 651576
WATER PUMP AND OUTLET Page17
Item Part Number Qty Description
1 3284864M1 1 Flange, Water Outlet
2 1440203X1 3 Nut (M8 - 1.25 Hex.)
3 353446X1 5 Washer (5/16" Lock)
4 3284112M1 1 Gasket, Water Outlet
5 3280574M1 1 Thermostat, Water Temperature
6 3284115M91 1 Housing Assembly, Thermostat
7 3284865M1 2 Stud (M8 - 1.5 x 38MM)
8 339123X1 2 Bolt (M8 - 1.25 x 20MM Hex.)
9 339011X1 1 Bolt (M8 - 1.25 x 45MM Hex.)
10 353446X1 3 Washer (5/16" Lock)
11 3284131M1 1 Switch, Water Temperature
12 3284113M1 1 Gasket, Water Inlet
13 3280171M1 2 Clamp, Hose
14 3284114M1 1 Hose, Water By-Pass
3284086M91 1 Pump Assembly, Water
20 1 Body (Order 3284086M91)
21 1 Fitting (Order 3284086M91)
22 3281281M1 1 Impeller, Water Pump
23 3281282M91 1 Seal Assembly, Pump
24 3281283M91 1 Shaft Assembly, Pump
25 3281284M1 1 Hub, Water Pump
26 3284084M1 1 Gasket, Water Pump
27 3284079M1 1 Cover, Water Pump
28 3284082M1 1 Gasket, Water Pump Cover
29 339262X1 2 (A) Bolt (M6 - 1.0 x 30MM Hex.)
30 353441X1 2 Washer (1/4" Lock)
31 339030X1 2 Nut (M6 - 1.0 Hex.)
32 1440712X1 1 Bolt (M8 - 1.25 x 40MM Hex.)
35 3284083M1 1 Strap, Adjusting
36 339168X1 1 Bolt (M8 - 1.25 x 50MM Hex.)
37 353446X1 3 Washer (5/16" Lock)
38 390972X1 2 Washer (8.4 x 17 x 1.6MM Flat)
39 1440203X1 1 Nut (M8 - 1.25 Hex.)
40 3437957M1 1 Spacer
41 3284080M1 1 Pulley, Water Pump
42 3281495M1 1 Belt, Fan (37")
43 3437409M1 1 Fan
44 3437955M1 4 Bolt
45 353441X1 10 Washer (1/4" Lock)
46 339351X1 4 Bolt (M6 - 1.0 x 25MM Hex.)
****************************************
(A) - Order 1440712X1 Bolt, (1) 390972X1
Flatwasher And (1) 353446X1 Lockwasher.