90_45_18 9688211RS Clutch Release Bearing Spare Parts Forklift Accessories

9688211RS Clutch Release Bearing — 90×45×18mm for Forklift Clutch Actuation

This 9688211RS is a sealed angular-contact ball bearing with dimensions 90mm OD × 45mm ID × 18mm width — the actual rotating element that presses against the clutch diaphragm spring fingers to disengage the clutch. Unlike the release bearing housing (which is the cast iron carrier that holds this bearing), this is the bearing itself: a precision-ground assembly of inner and outer races, ball elements, a cage, and permanent grease lubrication sealed behind rubber shields. The 90mm outer diameter and 45mm bore are the critical pairing dimensions — the OD presses into the release bearing housing bore with a light interference fit, and the ID slides over the transmission input shaft sleeve. A bearing that is even 0.5mm off on either dimension will either fall out of the housing (too small OD) or require excessive pressing force that cracks the cast iron carrier (too large OD). This is why the 9688211RS is identified by its dimensional triplet (90/45/18) rather than just a part number — the numbers ARE the specification.

The most common failure mode of the 9688211RS — and what distinguishes release bearing failure from every other clutch component failure — is a noise progression that experienced forklift mechanics can diagnose by ear. Stage 1: a faint chirp when the pedal is first depressed, audible only at idle with the engine cover open. At this stage the bearing grease has degraded but the balls and races are still intact. Stage 2: a constant squeal during pedal depression that disappears when the pedal is released — the bearing is now running dry and the balls are skidding instead of rolling on the race surface. Stage 3: a grinding rumble that you can feel through the pedal — the races are now spalled and the bearing is actively disintegrating. If you reach Stage 3, the diaphragm spring fingers are already being damaged by the rough bearing face, and replacing only the bearing will result in a second failure within weeks because the damaged fingers will destroy the new bearing’s face. The 9688211RS has a self-aligning contact face designed to accommodate the slight angular misalignment that occurs as the release fork articulates through its travel arc — a feature absent on cheaper generic bearings that causes accelerated finger wear from edge loading.

Direct fit for the 9688211RS specification — used across Heli CPCD20-CPCD35, TCM FD20-FD35, Toyota 7FD20-7FD35, and Komatsu FD20-FD35 2-3.5 ton diesel and LPG forklifts. Always replace the release bearing whenever the clutch is split, even if it feels smooth — the labor to access it far exceeds the bearing cost. Press the bearing into the housing using an arbor press with a driver that contacts only the outer race — pressing on the inner race or the shield will damage the bearing before it is even installed. For the release bearing housing, browse our clutch release bearing category. Reference OEM at Heli official website.

Technical Specifications

• SKU: 9688211RS
• Key Differentiator: 90×45×18mm — sealed angular-contact ball bearing. Verify all three dimensions (OD/ID/width) before ordering. NOT the housing — this is the bearing insert.
• Dimensions: 90mm OD × 45mm ID × 18mm Width
• Type: Sealed Angular-Contact Ball Bearing with Self-Aligning Contact Face
• Lubrication: Factory-Greased, Rubber-Shield Sealed (Maintenance-Free)
• Application: 2-3.5 Ton Diesel & LPG Clutch Release — Heli, TCM, Toyota, Komatsu
• Warranty: 12 Months

Compatible Forklift Models

Kingstream 9688211RS bearings are individually sealed in grease-proof wrapping, packed in rigid cartons. QC includes dimensional verification, rotation smoothness test, and seal integrity check. 12-month warranty. Contact us for fleet pricing or fitment verification.