Knotter Gear Pawl Safety Guard Assembly 700746535 Fits Challenger LB34BXD Square Baler Knotter System

Part 700746535 is the knotter gear and pawl safety guard assembly that transfers drive from the knotter clutch into the knotter shaft on Massey Ferguson and Challenger large square balers. The gear carries the twisting load of six knotters working in sequence, while the integrated guard keeps the pawl and spring captured so that a sticking pawl cannot drop into the gear teeth mid cycle and shear the drive.

Worn gear teeth show up as missed ties, uneven loop length and a rhythmic knock from the knotter stack that gets worse as the day warms up. Fitting a new assembly restores correct indexing between the needle timing and the knotter bill hooks, which is the single most common cause of double ties and broken twine on high density bales.

• Hardened tooth flanks resist pitting and step wear even when the knotter clutch slips under heavy straw load.
• Integrated pawl safety guard retains the pawl, spring and pin as one unit, cutting rebuild time at the knotter stack.
• Tooth profile and keyway machined to the original AGCO drawing so the gear seats on the shaft without shimming.
• Balanced cast body runs quietly at rated knotter speed and avoids the vibration that cracks neighbouring castings.
• Guard geometry prevents crop debris from packing behind the pawl, a frequent cause of missed knots in dusty conditions.
• Supplied assembled and pre greased, ready to bolt onto the knotter frame after removing the worn unit.

The assembly is listed for Challenger 2270XD, LB34BXD, CH LB34, CH LB34B and CH LB44B balers and for Massey Ferguson MF 2150, MF 2170, MF 2170XD, MF 2250, MF 2270, MF 2270XD and MF 2290. Workshops use it as the core part of a knotter overhaul, pairing it with a new clutch anvil and arm so that the whole drive train is renewed at the same time and the operator is not back inside the knotter stack a month later.

Gears are foam wrapped to protect the tooth flanks, boxed individually and labelled with the part number, then packed on a pallet with edge protection for sea freight. Air shipments use double wall cartons and every consignment includes a packing list cross referenced to the AGCO number so receiving staff can check the order without opening each box.

Tell us the baler model and the number of knotters on your machine when enquiring, and we will confirm the correct gear variant. Trial orders of one or two units are welcome so fitment and tooth wear can be verified in the field before a season stock order is placed.