Grain Combine (Massey Ferguson 550)

Hello

I have a MF 550 combine that is having hydraulic problems. It does not want to raise the header when it gets hot. It works fine for the first 30 to 45 mins. of running in the field. Although it does leak really slow down during the first rounds of a field but you can still bump the button up and it comes up. After about 45 mins it leaks down and when you go to raise it up, it will not.
Has anyone ever came across this problem before, anyone work on these and knows what is causing this :?: We nearly know it is not the pump because the hydraulics would not work at all and they do except for raising the header after it warms up but it will probably be the next step. We've replaced both magnetic cylinoids and in line filter.

Any help would be greatly appreciated :!:

Thanks in advance for the Replys

~[b:9ff251d16b]TXFarmer[/b:9ff251d16b]~

i hate to bring bad news if i am right we had a problem similar to this in our 860 if the head tries to start coming up like less than an inch every time you pull the leaver or push the button. open the engine compartment and look at the pump pully at full revs when you activate the hydrolics does the pump pully slow down if it does you need a new dampener pully on the engine not a cheap item for the 860 it was about 1200 bucks give or take a hundred. it could also be the relief valve. the way you check that is to take off the spool valve and take it to a hydrolic repair shop with a test stand and they'll be able to tell you. that might run you about 300 bucks. i'm sorry but it sounds like your dampener pulley, on the plus side with that pully new your hydrolics will be so snappy you'll think it is a new machine.
good luck levi

forgot something if it is that pulley you have to pull it straight back with no side pressure it is a very tight fit. it could be really hard in the behind the radiator on the 550. my cousin was trying like heck to pry it of with a bar while i took off the screen and he finally gave up i got the sceen off and it nearly fell of in my hands

I had some similar problems with my 550. As I remember the unloading auger would not swing and the variable speed cylinder would not move properly. Exception - I think the header did raise. The problem was in the valve block. There is a presure relief valve with a spring behind it. A set screw had vibrated decreasing the pressure on the spring letting too much oil pass by. I believe I took off the valve and tighten the spring and "set" it with lock tight. The header may not be regulated by this bypass. After I tightened the bypass everything worked great.

make sure the belt is very tight otherwise it will slip, not hard to adjust, may not be the problem but is something I have seen on 510/550 combines

Thanks, did what you said and the pulley didn't slow at all on the pump, but appreciate the advice :!:

~[b:f0264a52b3]TXFarmer[/b:f0264a52b3]~

well were both glad for you then because that is not a cheap fix. but you still have your problemthe only other thing i can think of is in that spool valve beside the cab. that happened once on a 760 we got and it had a lot of the same symptoms you describe but so did the dampener, sometimes i hate hydraulics.

Think this is the spool valve your talking about.

Item Part Number Qty Description
268098M2 1 (A) Valve, 3-Spool, Hydraulic (Cessna 31923Cag)
268098M1 1 (B) Valve, 3-Spool, Hydraulic (Cessna 31923-Aar)
2 1509485M1 2 Plunger, Lock-Out
3 1044486M1 1 Plunger, Unloading
4 1508873M91 5 (C) Poppet Assembly
5 1041771M91 5 Seat Assembly, Lock-Out
6 195868M1 1 (C) "O" Ring (1/2" I.D. x 1/16")
7 1041772M1 5 Spring, Lock-Out
8 1041773M91 3 Plug Assembly, Port Adapter
9 359295X1 1 (C) "O" Ring (5/8" I.D x 3/32")
10 366438X1 1 (C) Ring (41/64" I.D. x 55/64")
11 1051834M91 2 Plug Assembly, Seat Retainer
12 359295X1 1 (C) "O" Ring (5/8" I.D x 3/32")
13 366438X1 1 (C) Ring (41/64" I.D. x 55/64")
14 1041770M91 1 Plug Assembly
15 359295X1 1 (C) "O" Ring (5/8" I.D x 3/32")
16 366438X1 1 (C) Ring (41/64" I.D. x 55/64")
17 1041780M1 3 Bushing, Shoulder (Special)
18 1041777M1 3 Washer (21/64 x 43/64 x 1/16" Special)
19 1041796M1 3 Washer (21/64 x 43/64 x 1/64")
20 1041797M1 3 Washer (21/64 x 43/64 x 3/64")
21 1041779M1 3 Spring, Spool Centering
22 1041778M1 3 Spacer (21/64" I.D. x 29/64" Lg., Split)
23 1055577M1 3 Ring, Retaining (P/N 268098M2)
24 1041776M1 3 Screw, Spool (P/N 268098M1)
25 1055576M1 3 Cap, Work Ports (P/N 268098M2)
26 359363X1 3 Insert, Button (P/N 268098M2)
27 1041775M91 3 Cap Assembly (P/N 268098M1)
28 1 Filter, Cap (P/N 268098M1)
29 1051835M1 6 (C) "O" Ring (1/2" I.D. x 3/32" Thk.)
30 1051836M91 1 Plug Assembly
31 831461M1 1 (C) "O" Ring (9/16" I.D. x 3/32")
32 1021698M1 AR Shim (.015")
1020340M1 AR Shim (.010")
1032707M1 AR Shim (.035")
33 1028423M1 1 Spring
34 1025583M1 1 Poppet
35 278907M1 1 Plate (.020") (To Reduce Header Raise Shock)
36 268142M1 2 Plate, Orifice (.020")
37 268143M1 2 Plate, Orifice (.0135") (Not Used W/Hydrostatic)
38 268144M1 1 Plate, Orifice (.028")
39 268231M1 1 Plate, Orifice (.096")
40 835087M91 2 Plug Assembly (9/16" NF, Thrd.) (Not W/Hydrostatic Only)
41 359293X1 1 (C) "O" Ring (7/16" I.D. x 3/32")
837312M92 1 Kit, Seal Repair (Incl. All Items Marked "C")
****************************************

All of the [color=red:cc0d27b1bb][u:cc0d27b1bb][/color:cc0d27b1bb]red underlines[color=red:cc0d27b1bb][/u:cc0d27b1bb][/color:cc0d27b1bb] are the plastic poppets we have replaced.


Item Part Number Qty Description
****************************************
266320M91 1 Valve Assembly, Table Height (See Note A, Page 382)
2 Body (Order 266320M91)
3 1052330M1 1 Plug (3/4 - 16 x 7/8" NF, Hex.)
4 831497M1 2 (A) "O" Ring (41/64" I.D. x 5/64")
5 1052332M1 1 Plug (3/4 - 16 x 7/8" NF, Hex.)
6 1052333M1 1 Spring, Priority Spool
7 1052334M1 1 Disc, Spool and Spring
8 1052331M1 1 Spool, Priority
9 1052338M1 1 Plug (7/8" - 14 x 1" Hex.)
10 835024M1 1 (A) "O" Ring (3/4" I.D. x 3/32")
11 1052337M1 1 (A) Spring
12 196174M1 1 "O" Ring (3/4" I.D. x 1/16")
14 1052336M1 1 Poppet
15 1052335M1 1 Orifice, Flow
16 831533M1 1 (A0 "O" Ring (9/16" I.D. x 1/16")
17 1 Palnut (Order 353438X1 Nut, 1/2" NF, Hex.)
18 1052347M1 1 Cover, Coil
19 1052346M1 1 Coil
20 1052345M91 1 Sleeve Assembly
21 1052408M1 1 Washer (5/16 x 1/2 x 1/16" Thk.)
22 1052344M1 1 Armature, Poppet
24 1052343M1 1 Poppet
25 1052342M1 1 Retainer
26 1052341M1 1 (A) Orifice (.104")
27 371574X1 1 (A) "O" Ring (13/16" I.D. x 1/16" 90 Durometer)
28 359290X1 1 "O" Ring (1/4" I.D. x 1/16")
30 1052340M1 1 Plug, Seal
31 371573X1 1 (A) "O" Ring (1/16" I.D. x 13/64" O.D.)
32 1052339M1 1 (B) Orifice Plug (.028")
33 353691X1 1 Bolt (3/8 x 1" NC, Hex.)
34 375109X1 1 Nut (3/8" NC, Half Hex.)
35 359286X1 1 (A) "O" Ring (1/8"I.D. x 1/16"Thk)
36 1052351M1 1 Plug, Adjusting
37 835024M1 1 (A) "O" Ring (3/4" I.D. x 3/32")
38 1052352M1 1 Plunger, Adjusting
39 1052337M1 1 Spring
40 195868M1 1 (A) "O" Ring (1/2" I.D. x 1/16")
41 1052350M1 1 (A) Retainer, Dashpot
42 196174M1 1 "O" Ring (3/4" I.D. x 1/16")
43 1052348M1 1 Poppet
45 1052349M1 1 Orifice, Flow
46 831533M1 1 "O" Ring (9/16" I.D. x 1/16")
47 1052340M1 1 Plug, Seal
48 371573X1 1 "O" Ring (1/16" I.D. x 13/64" O.D.)
49 1052353M1 1 Orifice Plug (.046")
51 1 Palnut (Order 353438X1 Nut, 1/2" NF, Hex.)
52 1052347M1 1 Cover, Coil
53 1052346M1 1 Coil
54 1052359M91 1 Sleeve Assembly
55 1052408M1 1 Washer (5/16 x 1/2 x 1/16" Thk.)
56 1052358M1 1 Spring, Plug
57 1052356M1 1 Poppet, Orifice
59 1052357M1 1 Armature, Poppet
60 1052355M1 1 Retainer
61 371574X1 1 "O" Ring (13/16" I.D. x 1/16" 90 Durometer)
62 1052354M1 1 Orifice (.040")
63 359290X1 1 (A) "O" Ring (1/4" I.D. x 1/16")
65 1052361M1 1 Nut, Plug
66 835024M1 1 (A) "O" Ring (3/4" I.D. x 3/32")
67 1052360M1 1 Plug
68 1052362M1 1 Spring
69 1052363M1 1 Guide, Spring
70 354465X1 1 Ball (1/4" Dia.)
71 1052364M1 1 (C) Orifice
72 363510X1 1 (A) "O" Ring (1/2" I.D. x 1/16" Thk.)
73 1052337M1 1 Spring
74 1052365M1 1 Spring, Inner
75 1052366M1 1 Poppet, Check Valve
77 364139X1 1 Plug (7/16" NF, Hex. Hollow PT.)
78 831495M1 1 (A) "O" Ring (23/64" I.D. x 5/64")
79 1052358M1 1 Spring, Plug
80 1052368M1 1 Poppet, Check Valve
81 1052370M91 1 Tube Assembly
82 195561M1 2 "O" Ring (3/8" I.D. x 1/16")
83 1052369M1 1 Plate, Valve End
84 353668X1 2 Bolt (1/4 x 7/8" NC, Hex.)
85 353671X1 1 Bolt (1/4 x 1-1/4" NC, Hex.)
86 353441X1 3 Washer (1/4" Lock)
1052776M1 1 Orifice (.020") (To Retard)
837515M91 1 Kit, Seal Repair (Incls. All Items Marked "A")
****************************************

Just thought I would throw this out there.


Item Part Number Qty Description
****************************************
1 1 Tank Assembly, Hydraulic (See Page 373)
2 1 Pump Assembly, Hydraulic (See Page 377)
3 844487M1 1 (A) Hose Assembly, Hydraulic, Suction (18-1/2") (Also Used In Hydraulic Reel Drive Accessory)
4 835014M91 1 (A) Connector Assembly (1-5/16"-12)
5 835026M1 1 "O" Ring (1-11/64" I.D. x 7/64")
6 843284M1 1 (B) Hose (1" I.D. x 17-1/4" Long) (Order 842830M1 Hose)
7 244186M1 1 Connector, Pump Inlet
8 835025M1 1 "O" Ring (59/64" I.D. x 7/64")
9 364125X1 1 (C) Clamp, Hose (Grain)
364125X1 2 (C) Clamp, Hose (Rice)
10 835091M91 2 Connector Assembly (9/16" NF Thd.) (Grain)
835091M91 4 Connector Assembly (9/16" NF Thd.) (Rice)
11 359293X1 1 "O" Ring (7/16" I.D. x 3/32")
12 358745X91 1 (D) Tee (7/8 - 14 Adjustable
13 835024M1 1 "O" Ring (3/4" I.D. x 3/32")
14 22833X 1 Cap (7/8 - 14 Str.)
15 268621M1 1 (D) Filter, Oil Pump
16 371615X91 1 (E) Connector Assembly
17 835024M1 1 "O" Ring (3/4" I.D. x 3/32")
18 280432M91 1 (E) Filter Assembly (Order 268621M1 Filter And 358745X91 Tee)
19 1 Housing
20 1052886M1 1 Plug, End
21 371755X1 1 "O" Ring
22 1052887M1 1 Gasket
23 1052888M1 1 Element
24 1052889M1 1 Spring
25 356542X1 1 (E) Tee (7/8 - NF, 2-Way)
29 843751M1 1 (F) Hose Assembly (1/2" I.D. x 18" Lg.)
843750M1 1 (G) Hose Assembly (7/8" - NF x 33" Lg.)
30 364875X91 1 Elbow Assembly (3/4" NF x 7/8" NF, 90 Deg.) (Includes Item 32)
31 835013M91 1 Connector Assembly (7/8" - 14)
32 835024M1 1 "O" Ring (3/4" I.D. x 3/32")
33 1 Valve Assembly (See Page 382)
34 1 (D) Valve, 3-Spool, Hydraulic (See Page 386)
35 358727X91 1 Tee (9/16" NF, 3/8" Tube)
36 831452M1 1 "O" Ring (15/32" I.D. x 5/64")
37 268034M1 1 Tube, Header Valve to Conrol Valve
38 356579X1 1 Cap (9/16 - NF)
39 268032M1 1 Tube, Control Valve to Header Valve
41 355825X1 Connector, Straight (1/2" P.T. x 3/4" NF)
42 268662M1 1 (A) Tube Assembly, Hydraulic (Also Used In Hydraulic Reel Drive Accessory)
43 268046M1 1 (B) Tube, Return Tank to Valve
51 835091M91 4 Connector Assembly (9/16" NF Thd.)
52 359293X1 1 "O" Ring (7/16" I.D. x 3/32")
53 266545M1 1 Tube Assembly, Variable Speed
54 355529X1 2 Union (9/16" NF, Thread)
55 248952M92 2 Tube Assembly, Variable Speed
58 833538M1 1 Hose Assembly
59 832201M1 2 Connector
60 832499M1 1 Hose Assembly
61 1 Cylinder Assembly, Variable Speed (See Page 397)
62 250099M1 1 Yoke, Cylinder
63 248953M92 1 Tube Assembly, Variable Speed
64 266543M1 1 Tube Assembly, Variable Speed
65 835091M91 2 Connector Assembly (9/16" NF Thd.)
66 274592M1 2 Clamp
67 266541M1 1 Tube Assembly, Reel Control
68 356375X1 1 Elbow (9/16" NF, 90 Deg.)
69 250213M92 1 Tube Assembly, Reel Control
70 355830X1 1 Nut (9/16" NF, Hex., Lock)
71 356266X1 1 Union, Bulkhead (9/16" NF)
72 834660M1 1 Hose (3/8")
73 260226M92 1 Tube Assembly (3/8")
74 361312X1 2 Clip
75 834120M91 1 Hose Assembly
76 1026699M92 1 Coupling Assembly, Female Half
77 359297X1 1 "O" Ring (13/16" I.D. x 1/8")
78 1026700M91 1 Coupling Assembly, Male Half
79 260234M1 2 Clamp
80 252788M1 1 Plug, Dust
87 353667X1 AR Bolt (1/4 x 3/4" NC, Hex.)
88 354603X1 AR Bolt (1/4 x 2" NC, Hex.)
89 353441X1 AR Washer (1/4" Lock)
90 355564X1 AR Nut (1/4" NC, Hex.)
91 353685X1 AR Bolt (5/16 x 1-3/4" NC, Hex.)
92 353446X1 AR Washer (5/16" Lock)
93 355565X1 AR Nut (5/16" NC, Hex.)
96 353698X1 AR Bolt (7/16 x 1" NC, Hex.)
97 353757X1 AR Washer (15/32 x 59/64 x 1/16" Flat)
98 353432X1 AR Washer (7/16" Lock)
99 355645X1 AR Nut (7/16" NC, Hex.)

****************************************

the top valve is the one i'm talking about. and the minute i saw it it looks like the valve in our 860 not our 760. on the 760 it was a relief valve all in one assembly which is probably more costly. but this is more confusing to me anyway. when you repalced the poppets did any of them look melted or deformed which i've heard can cause problems like your having. If you don't have a good dealer with a very knowledgable service department I would recomend a hydrolic service outfit. those cesna valve bodies i think are pretty common. in western kansas we have kanamac hydraulics and thats who fixed it for me the Massey dealer couldn't test the valve to tell me the replacement valve was bout as good as the one it replaced. if there is a place that does hydrolic work around your area they are probably better than a dealer anyhow because they look at these kind of problems all the time. i hope you can get her fixed cause i bet your under a lot of presure right about now
good luck
Levi

Could you possibly have a cracked valve body? and when the body heats up the crack opens up? Seen that before not on a MF combine though, Also worn out spools in a valve or the bores they move in same as before, the heat causes the tolerances to change.... thats what it almost sounds like to me if it isn't something else. Vague I know but just an idea.

Now it wont work at all. steering is the only hydraulic that works. the oil is getting oven hot along with brand new pump, new poppets, new o rings in header control value and steering valve. Any updates or any help would be appreciated!

(quoted from post at 18:37:09 06/08/09) Hello

I have a MF 550 combine that is having hydraulic problems. It does not want to raise the header when it gets hot. It works fine for the first 30 to 45 mins. of running in the field. Although it does leak really slow down during the first rounds of a field but you can still bump the button up and it comes up. After about 45 mins it leaks down and when you go to raise it up, it will not.
Has anyone ever came across this problem before, anyone work on these and knows what is causing this :?: We nearly know it is not the pump because the hydraulics would not work at all and they do except for raising the header after it warms up but it will probably be the next step. We've replaced both magnetic cylinoids and in line filter.

Any help would be greatly appreciated :!:

Thanks in advance for the Replys

~[b:a3a7abdf5f]TXFarmer[/b:a3a7abdf5f]~

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