180-9367 CAT R1700 II Underground LHD Loader Tilt Cylinder Aftermarket Replacement

Product Overview

SEIGO’s aftermarket tilt cylinder, part number 180-9367, is a direct drop-in replacement for the Caterpillar R1700 II underground mining Load Haul Dump (LHD) loader, serial numbers 4LZ00131 and up. Confirmed by Caterpillar’s own parts catalogue as a hydraulic tilt cylinder, and cross-referenced by HW Part Store’s R1700 II seal kit data as a bucket tilt cylinder with a 10-inch (254 mm) bore and 5.5-inch (139.7 mm) rod diameter, this is the primary hydraulic actuator controlling the rack-back and dump functions of the bucket on the R1700 II’s front linkage system. Part 180-9367 represents an updated specification from the earlier cylinder 9EL-0626 that applied to the initial R1700 II production run (serial numbers 4LZ00127–00130).

On an underground LHD operating in hard-rock mine conditions, the tilt cylinder carries the full hydraulic breakout force during every pile penetration — the moment of peak loading when the bucket is driven into a blasted rock draw-point and the tilt circuit generates maximum racking force to fill the bucket against the resistance of the muck pile. In underground gold, copper, nickel, and platinum operations, this cycle repeats hundreds of times per shift across years of continuous service. The tilt cylinder on the R1700 II is positioned close to the bucket pivot, directly in the contamination zone where rock dust, ore fines, blast residue, and mine water are at their most concentrated — making wiper seal integrity and rod chrome quality the critical factors in service life.

SEIGO manufactures the 180-9367 to full OEM specification: 42CrMo4 induction-hardened, hard-chrome-plated piston rod to HRC 58–62, matched to the confirmed OEM rod diameter of 5.5 inches (139.7 mm) and bore diameter of 10 inches (254 mm). The cylinder barrel is produced from ST52 seamless honed steel. A genuine NOK (Japan) or Parker (USA) seal kit is fitted, specified for the high-pressure implement circuit of the R1700 II. Every unit is pressure-tested at 1.5× rated working pressure before shipment from our Guangdong, China factory, and is backed by a 12-month or 2,000 operating-hour warranty, whichever comes first. Standard lead time is 2–3 weeks ex-works, with a 5–7 day Rapid Production Track for underground site emergencies.

Technical Specifications Table

Machine Fitment & Serial Number Ranges

• Caterpillar R1700 II (SN prefix: 4LZ, S/N 00131-Up) — fits 180-9367 (tilt cylinder, full specification)
• Caterpillar R1700 II (SN prefix: 4LZ, S/N 00127–00130) — earlier tilt cylinder 9EL-0626 applies; confirm cross-fitment with SEIGO engineering team before ordering

Note: The current-generation CAT R1700 (Cat C13 engine, introduced 2019) is a clean-sheet redesign and uses different front linkage cylinder part numbers. Part 180-9367 is specific to the R1700 II platform. If you operate a current-generation R1700, please provide your full serial number to our engineering team.

Key Features & Quality Points

• OEM-confirmed fitment: 10-inch bore, 5.5-inch rod — matched to Caterpillar R1700 II S/N 4LZ00131-Up tilt cylinder specification
• Supersedes and dimensionally matches 9EL-0626 from the earlier R1700 II production run
• 42CrMo4 induction-hardened rod to HRC 58–62 — resists chrome pitting from rock dust, blast residue, and mine water in the bucket pivot contamination zone
• ST52 seamless honed steel barrel for consistent bore geometry and long seal service life
• NOK (Japan) / Parker (USA) premium seal kit — zero-leakage performance under continuous high-cycle breakout loading
• 100% pressure tested at 1.5× rated working pressure before shipment
• ISO 9001:2015 certified manufacturing process
• Drop-in fitment for 4LZ00131-Up — no machine modification required
• 12-month / 2,000-hour warranty, whichever comes first
• Export-grade fumigated wooden crate packaging; underground-delivery crating available on request
• FOB Shenzhen / CIF / DDP shipping terms available

FAQ

Q1: Is SEIGO 180-9367 dimensionally identical to the Caterpillar OEM part? A: Yes. Our 180-9367 is manufactured to match all OEM specifications including the 10-inch (254 mm) bore, 5.5-inch (139.7 mm) rod diameter, stroke length, mounting pin-eye dimensions, port locations, and thread specifications. It is a true drop-in replacement for the R1700 II from serial number 4LZ00131 onward, requiring no modification to the machine.

Q2: What is the relationship between 180-9367 and 9EL-0626? A: Part 9EL-0626 was the original tilt cylinder specification for the earliest R1700 II machines (serial numbers 4LZ00127–00130). From serial number 4LZ00131 onward, Caterpillar updated the specification to 180-9367, which features a larger 5.5-inch rod (vs. the earlier 4-inch rod on the 9EL-0626) and a full 10-inch bore. The two cylinders are not dimensionally identical and should not be substituted for one another without confirmation. SEIGO supplies both — please provide your full serial number when ordering.

Q3: Why does the tilt cylinder fail faster than the hoist cylinder on underground LHD loaders? A: The tilt cylinder is positioned closest to the bucket — the highest contamination point on any LHD. Every bucket penetration into a blasted muck pile sends rock dust, ore fines, blast residue, and moisture directly across the exposed rod as the bucket racks back and dumps. This abrasive contact bypasses the wiper seal progressively over time, scoring the chrome rod surface and accelerating primary rod seal failure. On the hoist cylinder, the rod is more protected by its position on the boom. As a result, tilt cylinders typically have shorter service intervals than hoist cylinders on the same machine in the same application.

Q4: What are the warning signs of a failing tilt cylinder on the R1700 II? A: Key indicators include: visible hydraulic oil leakage at the rod seal; bucket drift under load when the implement circuit is deadheaded (bucket slowly loses rack-back angle when held stationary); loss of full dump angle or inability to complete a full dump cycle; reduced tilt force causing stalling during aggressive bucket penetration; and visible chrome scoring or pitting on the rod surface during inspection. Any of these symptoms should trigger immediate inspection — a failed tilt cylinder in an underground drive creates an unplanned production stop that is difficult to recover from within a single shift.

Q5: What is the lead time for 180-9367? A: Standard production lead time is 2–3 weeks ex-works Guangdong, China. For underground site emergency orders, our Rapid Production Track delivers in 5–7 working days subject to materials availability. We are experienced in coordinating delivery logistics for underground mines — please advise your site access method (shaft, decline, portal) and maximum package dimensions at order time so our team can optimize packaging accordingly.

Q6: Should the tilt and hoist cylinders be replaced together? A: Not necessarily, as the two cylinders have different wear rates given their different positions and exposure to contamination. However, if your R1700 II is undergoing a planned maintenance shutdown for either cylinder, we recommend a thorough inspection of both. If operating hours are similar and the non-failed cylinder shows comparable rod wear or seal seeping, replacing both in the same shutdown reduces total unplanned downtime over the next service interval. SEIGO can supply matched tilt and hoist cylinder sets on a single purchase order.

Q7: Does 180-9367 fit the current-generation CAT R1700 (Cat C13 engine)? A: No. Part 180-9367 is specific to the R1700 II (serial prefix 4LZ, S/N 00131-Up). The current-generation R1700, introduced in 2019 as a clean-sheet redesign with the Cat C13 engine and redesigned front linkage geometry, uses a different tilt cylinder part number. If you operate a current-generation R1700, please provide your full machine serial number to SEIGO’s engineering team for confirmation of the correct cylinder before ordering.