A: The main crawler belt will repeatedly slacken or sag below standard clearances within a few hours of operation, often accompanied by packed grease weeping back out through the relief channel.
A: Mechanics must back out the valve hex slowly to let old grease vent through the built-in relief slot, and never stand directly in front of the valve while pressure remains in the adjuster rail.
A: Yes, the thread pitch and housing dimensions are perfectly unified across the listed 21-ton machine series, matching factory cylinder ports on standard and long-frame variations.
A: The interior seating mechanism is fitted with a heavy-duty tempered return spring that holds the steel check ball closed against external shock feedback, maintaining track tension without losing grease.
A: We provide original, OEM, and high-quality aftermarket versions with stable supply capability.
Q:Why Choose RITO?
A:Listed Factory
Stable&Reliable Quality
OEM Factory for Chinese Top Excavator Brands
Supplier to Fortune 500 Companies






















