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I have a TC33D and according to the operator's manual which also covers the TC29D:

Engine oil capacity with filter = 4.2 US Quarts
I use NH Diesel Engine Oil
15W-40 in summer and 10W-30 in winter

Rear axle with HST transmission = 8.8 US Gallons
NH 134 hydraulic oil
Don't forget HST and hydraulics filters

Rear axle with Gear transmission = 8.6 US Gallons
Manual lists 80W90 and 85W140 EP Gear Oil

If all else fails - call a NH dealer. Hope this helped.

tc29d oil capacity
New Holland Tractors
Replies 10 Post by Leonard_I

For what it's worth - I bought a new glow plug timer (control unit) and power relay today. Swapped out the old ones and everything seems OK now - thank goodness. Looks like all the relays are under the right (looking forward) lower cowl. Wasn't hard to work on except the loader made things less than convenient. The dealer said the timer was probably all that needed to be replaced but the power relay was just $13 so I thought good time while I'm in there. They also showed a third glow plug light relay that was a mystery and I didn't replace it. This is the fourth winter I've had the tractor - bought it new and have 500 hours with this being the first time I've had to wrench on it other than normal service. Thanks again for your advice.

Where are TC33D Glow Plug Relays
Parts and Repair
Replies 5 Post by Leonard_I