This is from some previous threads that I copied to one file, printed and use as a reference when I performed my HST hydraulic fluid change. It worked out OK for me on my 2004 7610HST except I slipped up and opened one of the plugs by the rear wheels first and fluid came out onto the rear tire first and then ran down which is rather messy. Open that one in the middle first which I think is referenced to in one of the comments below
Take your time and everything will be OK.
John
Well, the time has come for the 50hr. service of my new 7610. I currently have 49hrs. on it so I think the 50hr service will be happening this weekend.
Is there anything other than the below listed items that I need to do?
4 drain plugs to drain HST oil
HST oil filter
Engine Oil
Engine Oil Filter
Grease hydro pedal/etc.
Any screens, etc. that I need to worry about or is this pretty much it?
There is a screen by the hydraulic oil filter on the right side. It is attached to the "bolt" going through a banjo fitting.
This screen and location is shown in the
B7610 Operator's Manual on pages 61 and 62.
Just finished my 50 hr service on my
B7500 and I thought I'd post the most useful tips I have gleaned from others and on my own.
1. The plastic sheet under the tractor is a great idea.
2. Removing the 4 drain plugs starting with the front tranny, then the mid PTO, and finally the rear axle plugs is the best method because it avoids high head pressure from the 2 drains below the rear axles. I worked with three different oil pans under the plugs, rotating them and emptying them as necessary.
3. Take a lunch break while the front tranny drains. I drained all 3.3 gallons.
4. The largest hydraulic filter goes on the right side of the tractor in front of the strainer. The smaller (blue) filter goes on the left side.
5. After cutting the paint around the strainer nut with a razor blade, I found that my Craftsman 15 inch adjustable wrench worked really well to remove the strainer. Just be sure to snug it up real well on the nut. I found a few particles on the strainer, but not many. I wonder what the "non-flammable solvent" is that my manual suggests to use. Offhand the only non-flammable solvent I can think of is water! The air pressure idea sounds reasonable. I just flicked off the particles with a piece of paper towel, probably not the best method.
6. Be sure when checking wheel nuts to tighten the nut on the inside of each rear wheel. Mine were loose: no where near 100 ft-lb.
7. Don't forget to adjust the clutch nut. My clutch had too much play. Easy job.
8. All in all, this job is only slightly more complex than changing engine oil, so there's no real reason for someone like me to have the dealer do the service.
Now I think I'll print this so I don't forget it for next time!
Instructions for B7500HST 50 Hour Service
Plastic Sheet, hand light, 26mm, 19mm, 17mm, 14mm, extension socket, universal self adjusting filter wrench, large mouth long stem funnels
Place plastic sheet on floor and position hand light
Warm up Engine for 5 minutes
Remove oil drain plug (19mm with extension socket) with 3plus quart drain pan in place
Remove side panel of engine
Place pan under filter and take filter wrench (Sears metal self adjusting universal) and turn counterclockwise to remove oil filter (be careful of wires)
Place 3 ス gal pan and remove two Hydro drain plugs (17mm) near mid PTO
Remove left HST filter
Place 2 quart pan or extra large coffee can and remove drain plug near front left drive shaft (14mm)
Remove strainer (26mm) and clean out small filings
Take off right HST filter
Put in engine oil drain plug
Coat gasket of new oil filter (70000-15241) with oil and hand screw on
Fill Engine oil (15-30 diesel rated) with yellow funnel between marks on dipstick (3.2 quarts)
Tighten transmission strainer and all three transmission drain plugs
Hand tighten left (66021-36060) and right (67955-37710) HST Filters with gasket coated with oil.
Fill Hydro Oil (super UDT) with long stemmed wide mouth funnel into fill behind seat. Take off slow moving vehicle sign for better access.
It is actually a very easy job. Whole process takes about an hour and one half. Good luck!