Ford 1300 Main bearing replacement - How is is done?l

[Willoughby888]

Hi

I've got a Ford 1300 tractor (Shibaura LEK802 Two cylinder diesel engine) and it looks like the front main bearing needs replacing. Most main bearings I've come across, like the bigends, are made up of two halves that are clamped together onto the crankshaft with a pair of bolts. Not this engine. The bearing is circular (or a short cyndider) and appears to be pushed tightly into the round hole on the block with no fixings that I can see. However, this is a tight fit and doesn't want to budge. How does the old bearing come out and how do I replace it with hammering it out of shape?

Any advice would be much appreciated.

 

[Soundguy]

crank / rear main

1 1 SBA115256180 CRANKSHAFT Crankshaft Assy. Includes: Ref. 2 thru 6, Start Year: 01/01/1979
2 1 SBA115276090 GEAR Gear, Start Year: 01/01/1979
3 1 SBA034109004 KEY Key, Start Year: 01/01/1979
4 1 SBA115416020 NOZZLE Slinger, Oil, Start Year: 01/01/1979
5 2 SBA198466030 PLUG Plug 6.5 x 7mm, Start Year: 01/01/1979
6 1 SBA040116001 BALL BEARING Bearing, Pilot, Start Year: 01/01/1979
7 1 SBA115397160 PULLEY Pulley, Start Year: 01/01/1979
8 1 SBA199346011 WASHER Washer, Start Year: 01/01/1979
9 1 SBA010331225 BOLT Bolt, M12 x 25, Start Year: 01/01/1979
10 1 9845513 V-BELT V-BELT 0.38" W x 32.00" L, Start Year: 01/01/1979
12 2 SBA199266010 THRUST WASHER Washer, Start Year: 01/01/1979
13 1 SBA110406140 BEARING ASSY Cover Assy. Includes: Ref. 14 & 15, Start Year: 01/01/1979
14 1 SBA198516291 BEARING Bearing, Standard, Rear, Start Year: 01/01/1979
14 1 SBA198516501 BUSHING Bearing, Rear, .25mm or .010", NHNA Only, Start Year: 01/01/1979
14 1 SBA198516511 BEARING Bearing, Rear, .50mm or .020", NHNA Only, Start Year: 01/01/1979
15 2 SBA030300410 PIN Pin, Start Year: 01/01/1979
16 6 SBA011511025 CAPTIVE WASHER SCREW SCREW, CAPTIVE WASHER, Hex, M10 x 25, G5, Start Year: 01/01/1979
17 1 SBA198636050 SEAL Seal, Oil, Start Year: 01/01/1979
18 1 SBA110996141 GASKET Gasket, Start Year: 01/01/1979
19 1 SBA115356110 BALER FLYWHEEL Flywheel Assy., 1100, Start Year: 01/01/1979
19 1 SBA115356180 BALER FLYWHEEL Flywheel Assy., 1200, Start Year: 01/01/1980
19 1 SBA115356200 BALER FLYWHEEL Flywheel Assy., 1300 Includes: Ref. 20, Start Year: 01/01/1979
20 1 SBA115376040 RING GEAR Gear, Start Year: 01/01/1979
21 1 SBA034109026 KEY Key, Start Year: 01/01/1979
22 1 SBA199316021 LOCK WASHER Washer, Start Year: 01/01/1979
23 1 SBA199376031 NUT Nut, Start Year: 01/01/1979

 

[Soundguy]

front main / cyl block ( # 8 )


AR SBA110006010 SHORT ENGINE Short Block Assy., 1100, Engine Assembies Include: Cylinder Block Assy., Crankshaft Assy., Camshaft Assy. & Piston & Rod Assy., Start Year: 01/01/1979
AR SBA110006020 SHORT ENGINE Short Block Assy., 1200,1300, Engine Assembies Include: Cylinder Block Assy., Crankshaft Assy., Camshaft Assy. & Piston & Rod Assy., Start Year: 01/01/1979
1 1 SBA110106300 CYLINDER BLOCK Bare Block Assy., 1100 Includes: Ref. 2 thru 10, Start Year: 01/01/1979
1 1 SBA110106290 BLOCK Bare Block Assy., 1200,1300 Includes: Ref. 2 thru 10, Start Year: 01/01/1979
2 2 SBA198466010 PLUG Plug 8.4mm, Start Year: 01/01/1979
3 2 SBA198466020 PLUG Plug 10.4mm, Start Year: 01/01/1979
4 1 SBA064210040 CAP Cap, 40mm, Start Year: 01/01/1979
5 1 SBA064100055 PLUG Plug, 55mm Dia, Start Year: 01/01/1979
6 2 SBA030501025 BALL PIN DOWEL, M10 x 25 L, Pin, Start Year: 01/01/1979
7 2 SBA030500625 DOWEL DOWEL, Pin, Start Year: 01/01/1979
8 1 SBA198516291 BEARING Bearing, Front Main, Standard, Start Year: 01/01/1979
8 1 SBA198516501 BUSHING Bearing, Front Main, .25mm or .010", Start Year: 01/01/1979
8 1 SBA198516511 BEARING Bearing, Front Main, .50mm or .020", Start Year: 01/01/1979
9 2 SBA030300410 PIN Pin, Start Year: 01/01/1979
10 2 SBA198466030 PLUG Plug 6.5 x 7mm, Start Year: 01/01/1979
11 6 SBA111136030 STUD Bolt, Start Year: 01/01/1979
12 6 SBA199376010 NUT Nut, Start Year: 01/01/1979
13 4 SBA120116070 TAPPET Tappet, Start Year: 01/01/1979
14 4 SBA120456090 ROD Rod, Push, Start Year: 01/01/1979
15 1 SBA165996211 GASKET Gasket, Start Year: 01/01/1979
16 1 SBA165166100 PLATE Plate, Start Year: 01/01/1979
17 19 SBA011510820 CAPTIVE WASHER SCREW SCREW, CAPTIVE WASHER, Hex, M8 x 20, G5, Start Year: 01/01/1979
18 1 SBA012110820 STUD STUD, Bolt, Start Year: 01/01/1979
19 1 89706690 NUT NUT, M8, Cl 8, Start Year: 01/01/1979
20 1 SBA120076040 SHAFT Shaft Assy. Tachometer Drive, Start Year: 01/01/1979
21 1 SBA120996011 GASKET Gasket, Start Year: 01/01/1979
22 2 SBA198996020 GASKET Gasket, Start Year: 01/01/1979
23 2 378056 SCREW BOLT, Hex, M6 x 10, 8.8, Full Thd , Start Year: 01/01/1979
24 1 SBA110996150 GASKET Gasket, Start Year: 01/01/1979
25 1 SBA110766040 COVER Holder, Start Year: 01/01/1979
26 4 SBA011510820 CAPTIVE WASHER SCREW SCREW, CAPTIVE WASHER, Hex, M8 x 1.25 x 20, G5, Start Year: 01/01/1979
27 1 SBA198416050 GAUGE Gauge, Start Year: 01/01/1979
28 1 SBA052100400 O-RING O-Ring, Start Year: 01/01/1979
29 1 SBA198436010 FILLER CAP Cap, Start Year: 01/01/1979
30 1 SBA185246011 SENDER UNIT Sender, Start Year: 01/01/1979
31 1 SBA140546010 STUD Joint, Start Year: 01/01/1979
32 1 E1NN6714AB FILTER Filter, Oil, Start Year: 01/01/1979
33 1 SBA198736052 TUBE Drain, Start Year: 01/01/1979
34 1 SBA068118280 TUBE Tube, Start Year: 01/01/1979
35 1 SBA110366110 PLATE Plate, 1100, Start Year: 01/01/1979
35 1 SBA110366130 PLATE Plate, 1200,1300, Start Year: 01/01/1979
36 10 SBA011511020 BOLT BOLT, M10 x 20, Start Year: 01/01/1979
37 1 SBA110996300 GASKET Gasket, Start Year: 01/01/1979
38 1 SBA110706230 ENGINE OIL PAN Pan, 1100, Start Year: 01/01/1979
38 1 SBA110706380 PAN Pan, 1200, Start Year: 01/01/1980
38 1 SBA110706180 PAN Pan, 1300, Start Year: 01/01/1979
39 16 SBA011510820 CAPTIVE WASHER SCREW SCREW, CAPTIVE WASHER, Hex, M8 x 20, G5, Start Year: 01/01/1979
40 16 86511315 WASHER WASHER, M8 x 16 x 1.6, Start Year: 01/01/1979
41 1 SBA025100012 WASHER WASHER, M12, Seal, Start Year: 01/01/1979
42 1 412211 BOLT BOLT, Hex, M12 x 1.25 x 25, 8.8, Full Thd, Start Year: 01/01/1979

 

[RoyJackson]

Hi

However, this is a tight fit and doesn't want to budge. How does the old bearing come out and how do I replace it with hammering it out of shape?

Any advice would be much appreciated.

It's probably a press fit (also referred to as an "Interference" fit). You'll most likely have to press it out. That will require removing the engine. If you know what you're doing you could try dry ice (to cool and "shrink" the bearing) and tap it out. I've never seen this done on an installed engine though.
I suggest you not tap on the bearing. Use a spud with the smaller diameter a few thousandths smaller then the bearing inside diameter.

 

[TraderMark]

I just put main bearings in my sister's 1300.
You'll need a bushing driver the correct size for those bearings. They are a "one piece" bearing and are truly more like a bushing than what we normally think of as a main bearing. I used a driver from my HF set of bearing race drivers, but I can't remember which one it was.
Before you drive the old bushing out, make note of how it's positioned in the hole, you'll need to line the new bushing up the same way so the oil supply holes remain open.

Once you have the old bushing out, just use a driver of the correct size to drive the new one in. They are a tight fit, but not so tight that they need to be pressed in or out.

Hope this helps.
Mark

 

[TraderMark]

And as Roy said..... there's no way to replace the main bearings without removing the engine and then removing the crank.

 

[Willoughby888]

And as Roy said..... there's no way to replace the main bearings without removing the engine and then removing the crank.

Many thanks Roy and Trader - that's really helpful. The engine is already disassembled - I'm putting in a second hand crank after the one in it snapped and I'd be tempted to leave the bearing where it is but the old crank was under size and the replacement standard so without new, standard bearings it won't actually go in.

None the less, thanks for the clarification at least now I know what I'm dealing with.

Will

 

[TraderMark]

Exactly what I had to do with my sister's 1300. Seems to be a bit of a weak point with those 2cyl diesels. Took me a while to find a good used crank, but a new one is no longer available.

 

[Willoughby888]

Exactly what I had to do with my sister's 1300. Seems to be a bit of a weak point with those 2cyl diesels. Took me a while to find a good used crank, but a new one is no longer available.

And if parts are scarce that side of the pond, they're even more difficult to get hold of here in the UK. Did you think about re-engining it? I've got a Kubota D850 which is perfect in terms of size, exactly the right power and rev range but, after looking into it, it's sooooo complicated. I'd have to hack a whole in the bell housing for a start (starter motor is on the opposite side and won't change on the engine due to injector and hyd pump in the way). The flywheels are different thicknesses which set ups issues with the clutch and clutch relaease bearing. Nightmare. Have you any experience doing something like this?

W

 

[TraderMark]

I did think about repowering with a different engine. My first thought was to try a 3cyl from a 1310. But all the used engines I found would have cost more than the tractor would have been worth since it would have been a franken-tractor.

All in all I made out pretty well. I found a used crank for $500, of course the new parts (piston rings, gaskets, bearings, etc) from New Holland were very pricey.

We decided to fix her up with the used crank and let her run for as long as she will run. If and when she goes down again it'll be time to part her out and invest in a newer model.

Mark