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John Deere MJ4099 - FRONTIER

OEM parts breakdown

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The Frontier MJ4099 is a Bale Hugger for which a service and repair manual is available.

MJ4099 - FRONTIER common service parts

Part number	Part	Notes
U12547	O-Ring	Scheduled service item	Check fitment →

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All MJ4099 - FRONTIER assemblies by section

Every catalogued assembly group for the John Deere MJ4099 - FRONTIER. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

110" Hay Bale Squeeze (Mj4090) [A18]

John Deere : Mj4099 - Frontier : 110" Hay Bale Squeeze (Mj4090) [A18]

5M***26	Bolt; 5/16" Unf X 2", Hex Bolt, Bolt; 5/16"-24unf X 2" Long, Bolt; 5/16"-18unc X 2" Long	2
5M***43	Cap Screw; 3/8" Unc X 1", Cap Screw; 3/8"-16unc X 1" Long, Cap Screw; 3/8" Unc X 1" Hex Capscrew, Cap Screw; Gr8, 3/8"-16unc X 1" Long, Cap Screw; .38 Uncx1.00 Hex	4
5M***02	Lock Washer; .31" Lock, Lock Washer; 5/16", Lock Washer; 5/16	2
5M***03	Lock Washer; 3/8" Lock Washer, Lock Washer; 3/8", Lock Washer; .38" Lock	4

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48" Hay Bale Squeeze (Mj4091) [A20]

John Deere : Mj4099 - Frontier : 48" Hay Bale Squeeze (Mj4091) [A20]

5M***26	Bolt; 5/16" Unf X 2", Hex Bolt, Bolt; 5/16"-24unf X 2" Long, Bolt; 5/16"-18unc X 2" Long	2
5M***43	Cap Screw; 3/8" Unc X 1", Cap Screw; 3/8"-16unc X 1" Long, Cap Screw; 3/8" Unc X 1" Hex Capscrew, Cap Screw; Gr8, 3/8"-16unc X 1" Long, Cap Screw; .38 Uncx1.00 Hex	2
5M***02	Lock Washer; .31" Lock, Lock Washer; 5/16", Lock Washer; 5/16	2
5M***03	Lock Washer; 3/8" Lock Washer, Lock Washer; 3/8", Lock Washer; .38" Lock	2

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72" Manure Fork & Grab (Mj4076) [A08]

John Deere : Mj4099 - Frontier : 72" Manure Fork & Grab (Mj4076) [A08]

5M***83	Bolt; Hex Head, 1"-8unc X 1-1/2" Long	8
5M***77	Bolt; 5/16"-24unf X 2-1/4" Long, Bolt; Hex Head, 5/16"-24unf X 2-1/4" Long	4
5M***79	Bolt; 5/16" Unf X 2-3/4", Bolt; 5/16"-24unf X 2-/34" Long, Bolt; 5/16"-24unf X 2-3/4" Long, Bolt; Hex Head, 5/16"-24unf X 2-3/4" Long	2
5M***35	Tine; 2" Dia. X 37-1/2" Long	8

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96" Manure Fork & Grab (Mj4077) [A10]

John Deere : Mj4099 - Frontier : 96" Manure Fork & Grab (Mj4077) [A10]

5M***83	Bolt; Hex Head, 1"-8unc X 1-1/2" Long	11
5M***77	Bolt; 5/16"-24unf X 2-1/4" Long, Bolt; Hex Head, 5/16"-24unf X 2-1/4" Long	4
5M***79	Bolt; 5/16" Unf X 2-3/4", Bolt; 5/16"-24unf X 2-/34" Long, Bolt; 5/16"-24unf X 2-3/4" Long, Bolt; Hex Head, 5/16"-24unf X 2-3/4" Long	2
5M***35	Tine; 2" Dia. X 37-1/2" Long	11

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Brush Grapple (Bg1096) [B21]

John Deere : Mj4099 - Frontier : Brush Grapple (Bg1096) [B21]

5M***17	Pin; 1-3/8" Dia. X 5-1/8" Long	4
5M***19	Pin; 1-3/4" Dia. X 4-1/4" Long	4
5M***38	Raw Weldment; Fork Weldment, Grapple, Left	1
5M***39	Raw Weldment; Fork Weldment, Grapple, Right	1

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Complete Bucket With Optional Grapple Assembly (At2016u) [B07]

John Deere : Mj4099 - Frontier : Complete Bucket With Optional Grapple Assembly (At2016u) [B07]

5M***12	Bolt; (A) (B) 3/4"-10unc X 2-1/4" Long	10
5M***48	Bolt; (A) (B) 3/8"-16unc X 2-1/4" Long, Bolt; 3/8" Unc X 2-1/4", Hex Bolt	4
5M***51	Bolt; 3/8" Unc X 3", Hex Bolt, Bolt; (A) (B) 3/8"-16unc X 3" Long, Bolt; 3/8"-16unc X 3" Long	2
5M***66	Hydraulic Cylinder C; Cover, Female Quick Connect, Hydraulic Cylinder C; (A) (B) Female Quick Disconnect	2

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Cylinder Assembly, 2-1/2" Bore X 10" Stroke (5mp89117) [B01]

John Deere : Mj4099 - Frontier : Cylinder Assembly, 2-1/2" Bore X 10" Stroke (5mp89117) [B01]

5M***83	Lock Nut; (Torque To 150-200 Ft. Lbs.), Lock Nut, Lock Nut; Hex, Lock Nut; Hex Nut(Torqueto230-325ft.Lbs.)	1
5M***17	Packing; Cylinder Seal Kit (Includes All Parts Marked With (A)), Packing; Kit, Cylinder Packing (Includes All Parts Marked With A), Packing; Kit, Cylinder Packing, Packing; (Includes Items Marked With (A))	1
5M***52	Hydraulic Cylinder C, Hydraulic Cylinder C; Piston, Aluminum, Hydraulic Cylinder C; Aluminum Piston	1
5M***21	Washer	1

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Cylinder Assembly, 2-1/2" Bore X 12" Stroke (5mp33524) [B09]

John Deere : Mj4099 - Frontier : Cylinder Assembly, 2-1/2" Bore X 12" Stroke (5mp33524) [B09]

5M***83	Lock Nut; (Torque To 150-200 Ft. Lbs.), Lock Nut, Lock Nut; Hex, Lock Nut; Hex Nut(Torqueto230-325ft.Lbs.)	1
5M***81	Plug	1
5M***25	Hydraulic Component; Jacket Assembly, With Valve	1
5M***17	Packing; Cylinder Seal Kit (Includes All Parts Marked With (A)), Packing; Kit, Cylinder Packing (Includes All Parts Marked With A), Packing; Kit, Cylinder Packing, Packing; (Includes Items Marked With (A))	1

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Cylinder Assembly, 2-1/2" Bore X 8" Stroke (5mp88928) [B03]

John Deere : Mj4099 - Frontier : Cylinder Assembly, 2-1/2" Bore X 8" Stroke (5mp88928) [B03]

5M***83	Lock Nut; (Torque To 150-200 Ft. Lbs.), Lock Nut, Lock Nut; Hex, Lock Nut; Hex Nut(Torqueto230-325ft.Lbs.)	1
5M***17	Packing; Cylinder Seal Kit (Includes All Parts Marked With (A)), Packing; Kit, Cylinder Packing (Includes All Parts Marked With A), Packing; Kit, Cylinder Packing, Packing; (Includes Items Marked With (A))	1
5M***52	Hydraulic Cylinder C, Hydraulic Cylinder C; Piston, Aluminum, Hydraulic Cylinder C; Aluminum Piston	1
5M***21	Washer	1

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Cylinder Assembly, 2-1/2" Bore X 9" Stroke (5mp101280) [B23]

John Deere : Mj4099 - Frontier : Cylinder Assembly, 2-1/2" Bore X 9" Stroke (5mp101280) [B23]

5M***75	Hydraulic Cylinder B; Jacket Assembly	1
5M***78	Piston; Rod, Piston	1
5M***38	Seal; Kit, Cylinder Packing (Includes All Parts Marked With A)	1
5M***10	Bushing; 1-3/8" Id X 1-5/8" Od X 1-3/4" Long, Split	1

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Cylinder Assembly, 3" Bore X 8" Stroke (5mp18641) [B19]

John Deere : Mj4099 - Frontier : Cylinder Assembly, 3" Bore X 8" Stroke (5mp18641) [B19]

5M***42	Tube; Jacket Assembly	1
5M***44	Hydraulic Cylinder R; Rod, Piston	1
5M***39	Seal Kit; Kit, Cylinder Packing (Includes All Parts Marked With A)	1
5M***31	Piston; Aluminum	1

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Cylinder Assembly, 3-1/2" Bore (5mp32401) [B17]

John Deere : Mj4099 - Frontier : Cylinder Assembly, 3-1/2" Bore (5mp32401) [B17]

5M***83	Lock Nut; (Torque To 150-200 Ft. Lbs.), Lock Nut, Lock Nut; Hex, Lock Nut; Hex Nut(Torqueto230-325ft.Lbs.)	1
5M***88	Seal Kit; Kit, Cylinder Packing (Includes All Parts Marked With A), Seal Kit; Replacement Seal Kit	1
5M***03	Hydraulic Cylinder R; Piston Rod	1
5M***04	Hydraulic Component; Jacket Assembly	1

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Debris Grapple Bucket (Mj4062) [A06]

John Deere : Mj4099 - Frontier : Debris Grapple Bucket (Mj4062) [A06]

5M***02	Cutting Edge; Bolt On	1
5M***77	Bolt; 5/16"-24unf X 2-1/4" Long, Bolt; Hex Head, 5/16"-24unf X 2-1/4" Long	4
5M***79	Bolt; 5/16" Unf X 2-3/4", Bolt; 5/16"-24unf X 2-/34" Long, Bolt; 5/16"-24unf X 2-3/4" Long, Bolt; Hex Head, 5/16"-24unf X 2-3/4" Long	4
5M***38	Pin; 1" Dia. X 6-3/4" Long	2

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Decals [C01]

John Deere : Mj4099 - Frontier : Decals [C01]

5M***27	Label; Caution, To Prevent Bodily Injury, Label; Caution, Prevent Bodily Injury, Label; Caution Prevent Bodily Injury	0
5M***63	Label; Warning, To Prevent Bodily Injury	2
5M***94	Label; Frontier Hydraulic Kit, Models 3200 & 3400	1
5M***16	Label; Model Bf1102s	1

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Frontier Conversion Kit For Silage Defacer [B15]

John Deere : Mj4099 - Frontier : Frontier Conversion Kit For Silage Defacer [B15]

00***88	Bolt; 5/8"-11unc X 1-1/2" Long	2
00***83	Shield; Cover, Dust	1
00***94	Union Fitting	3
00***54	Fitting	1

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Hay Bale Grab (Mj4060) [A12]

John Deere : Mj4099 - Frontier : Hay Bale Grab (Mj4060) [A12]

5M***50	Bolt; 3/8"-16unc X 2-3/4" Long, Bolt; 3/8" Unc X 2-3/4" Hex Capscrew, Bolt; Hex Head, 3/8"-16unc X 2-3/4" Long	28
5M***51	Bolt; 3/8" Unc X 3", Hex Bolt, Bolt; (A) (B) 3/8"-16unc X 3" Long, Bolt; 3/8"-16unc X 3" Long	16
5M***57	Bolt; 3/8"-16unc X 5" Long	4
5M***26	Nut; 3/8"16unc, Nut; 3/8" Unc	20

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Hay Bale Grab Hydraulics (Mj4060a) [A14]

John Deere : Mj4099 - Frontier : Hay Bale Grab Hydraulics (Mj4060a) [A14]

5M***78	Bolt; 5/16"-24unf X 2-1/2" Long	2
5M***31	Valve; Relief, 1000 Psi, Valve; Valve, Relief, 1000 Psi, Valve; 1000 Psi	1
5M***02	Lock Washer; .31" Lock, Lock Washer; 5/16", Lock Washer; 5/16	2
5M***52	Fitting; (A) (B) Hydraulic, Straight, 8morfs X 10mbo, Fitting; Hydraulic, Straight, 8morfs X 10mbo, Fitting; Straight, 8morfs X 10mbo, Fitting; 8mfs-10mbo Straight Connector, Fitting; 8morfs X 10mbo, Hydraulic, Straight	2

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Large Bale Carriage (Bf1102s) [B05]

John Deere : Mj4099 - Frontier : Large Bale Carriage (Bf1102s) [B05]

5M***98	Bolt; 1/2"-13unc X 3-1/2" Long, Bolt; 1/2" Unc X 3-1/2" Hex Capscrew	4
5M***41	Nut; (C: Ay11e 72" Bucket Only) (D: Ay12d & Ay12g 78" Buckets) (E: Ay12d & Ay12g 84" Buckets) 1/2" Unc Deformed, Nut; 1/2" Unc Deformed, Nut; 1/2"-13unc, Deformed Oval, Nut; 1/2" Unc, Torque Lock Nut, Nut; 1/2" Unc, Deformed Lock Nut, Nut; 1/2" Unc	4
5M***32	Frame; Frame Weldment	1
5M***46	Spike; Bale Spear, Spike; Bale	4

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Large Square Bale Spike (Mj4081) [A25]

John Deere : Mj4099 - Frontier : Large Square Bale Spike (Mj4081) [A25]

5M***11	Bolt; 3/4" Unf X 1-1/2", Hex Bolt - Gr8, Bolt; Hex Head, Gr8, 3/4"-16unf X 1-1/2" Long, Bolt; .75" Unfx1.50" Hex, Bolt; 3/4" Unf X 1-1/2" Hex. - Gr8	2
5M***17	Frame; Frame Weldment	1
5M***18	Tine; Tine, 49 " Long, Includes Key 3	2
5M***07	Lock Washer; .75" Loc, Lock Washer; 3/4"	2

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Round Bale Hugger (Mj4099) [A22]

John Deere : Mj4099 - Frontier : Round Bale Hugger (Mj4099) [A22]

5M***26	Bolt; 5/16" Unf X 2", Hex Bolt, Bolt; 5/16"-24unf X 2" Long, Bolt; 5/16"-18unc X 2" Long	2
5M***12	Bolt; 5/8"-11unc X 1" Long	8
5M***02	Lock Washer; .31" Lock, Lock Washer; 5/16", Lock Washer; 5/16	2
5M***06	Lock Washer; (A: Ay11h 60" Bucket Only) (B: Ay11e 72" Bucket Only) 5/8", Lock Washer; 5/8", Lock Washer; 5/8" Lock Washer	8

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Silage Defacer (Sd1096) [B11]

John Deere : Mj4099 - Frontier : Silage Defacer (Sd1096) [B11]

5M***88	Bolt; 1/2" Unc X 1" Hex Bolt, Bolt; 1/2"-13unc X 1" Long, Bolt; 1/2" Unc X 1" Hex Capscrew, Bolt; 1/2"-13unc X 1" Long, Bolt, Hex Head, Bolt; 1/2" X 1" Unc Hex Bolt, Bolt; 1/2" Unc X 1", Hex - Gr5	12
5M***28	Nut; 1/2" Unc, Nut; 1/2"-13unc, Nut, Hex, Nut; 1/2"-13unc, Nut; 1/2"	4
5M***14	Washer; Flat, 3/8", Washer; Washer Flat, 3/8", Washer; 3/8" Flat, Washer; 3/8", Washer; 3/8", Washer, Flat, Washer; 10 3/8", 10 Flat, Washer; .38" Flat	4
5M***13	Pneum.Quick-Connect ; Female, 12fbo	1

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Silage Defacer (Sd1096) [B13]

John Deere : Mj4099 - Frontier : Silage Defacer (Sd1096) [B13]

5M***88	Bolt; 1/2" Unc X 1" Hex Bolt, Bolt; 1/2"-13unc X 1" Long, Bolt; 1/2" Unc X 1" Hex Capscrew, Bolt; 1/2"-13unc X 1" Long, Bolt, Hex Head, Bolt; 1/2" X 1" Unc Hex Bolt, Bolt; 1/2" Unc X 1", Hex - Gr5	12
5M***28	Nut; 1/2" Unc, Nut; 1/2"-13unc, Nut, Hex, Nut; 1/2"-13unc, Nut; 1/2"	4
5M***14	Washer; Flat, 3/8", Washer; Washer Flat, 3/8", Washer; 3/8" Flat, Washer; 3/8", Washer; 3/8", Washer, Flat, Washer; 10 3/8", 10 Flat, Washer; .38" Flat	4
5M***47	Spacer	1

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Single Bale Spike (Mj4037) [A24]

John Deere : Mj4099 - Frontier : Single Bale Spike (Mj4037) [A24]

5M***11	Bolt; 3/4" Unf X 1-1/2", Hex Bolt - Gr8, Bolt; Hex Head, Gr8, 3/4"-16unf X 1-1/2" Long, Bolt; .75" Unfx1.50" Hex, Bolt; 3/4" Unf X 1-1/2" Hex. - Gr8	2
5M***18	Tine; Tine, 49 " Long, Includes Key 3	1
5M***27	Frame; Frame Weldment	1
5M***32	Tine; 1" Dia. X 16" Long	2

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Small Square Bale Fork (Mj4074) [A16]

John Deere : Mj4099 - Frontier : Small Square Bale Fork (Mj4074) [A16]

5M***01	Lock Nut; 3/4", Lock Nut; Gr8, 3/4"-16unf	8
5M***17	Bolt; 3/4" Unf X 2-3/4", Hex Bolt - Gr8, Bolt; Gr8, 3/4"-16unf X 2-3/4" Long	8
5M***79	Bolt; 5/16" Unf X 2-3/4", Bolt; 5/16"-24unf X 2-/34" Long, Bolt; 5/16"-24unf X 2-3/4" Long, Bolt; Hex Head, 5/16"-24unf X 2-3/4" Long	2
5M***96	Bolt; 3/8" Unf X 1-3/4", Bolt; 3/8"-24unf X 1-3/4" Long	2

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