Original SANY Keeper Plate 169900000120A Construction Machinery Parts

The genuine SANY parts reference 169900000120A is the Keeper Plate, a precision‑stamped component used to retain springs, pins, or shafts in SARY heavy machinery assemblies. The 169900000120A keeper plate is typically installed over a spring or under a bolt head to prevent axial movement and ensure components remain captured even under vibration.

Manufactured from hardened spring steel with a corrosion‑resistant zinc‑phosphate coating, this keeper plate provides reliable retention and long service life. Each 169900000120A unit is 100% inspected for hole pattern, flatness, and hardness, guaranteeing secure fastening in SRT dump trucks, SY excavators, SW wheel loaders, and motor graders.

Keeper Plate

Фиксаторная пластина

Placa retenedora

Keeper Plate

Фиксаторная пластина

Placa retenedora

Keeper Plate

Фиксаторная пластина

Placa retenedora

Material and Design of Keeper Plate 169900000120A

The keeper plate 169900000120A is stamped from spring steel (SAE 1074 / C75S) and heat‑treated to a hardness of 40-50 HRC. The plate has a typical thickness of 2.5 mm, with outer dimensions of 40 mm x 30 mm. It features two or three precision‑drilled mounting holes (6.5 mm diameter) and a central slot or notch that captures the retained component (spring, pin, or shaft).

After stamping, the plate is stress‑relieved and then zinc‑phosphated (8-12 µm) followed by an oil dip. This coating provides 96 hours of salt spray resistance (ASTM B117). The plate is designed to be flat within 0.1 mm per 25 mm; excessive bow reduces retention force. A small bend (10‑15°) is sometimes incorporated to act as a spring finger, increasing clamping force on the retained part.

The keeper plate 169900000120A is typically installed over a spring or under a bolt head. When bolted down, the plate compresses the spring or retains a pin, preventing it from backing out under vibration. The plate is single‑use; removal may distort the mounting holes or spring finger. Always replace the plate when disassembling the joint.

All 169900000120A plates are 100% inspected for hole size and position (using CMM), flatness, and hardness. A sample from each batch is tested for spring force (if a spring finger is present) and proof load. A batch code is stamped on the plate or packaging for full traceability.

Critical Applications of Keeper Plate 169900000120A

The keeper plate 169900000120A is used in valve train assemblies (retaining valve spring retainers), hydraulic valve bodies (retaining spool return springs), and transmission shift mechanisms. On SRT dump trucks, it retains the brake release spring on calipers. On SY excavators, it secures the swing brake spring and the pilot valve return springs.

In SANY diesel engines (D07/D09/D12), 169900000120A plates retain the valve collet keepers and injector return springs. A missing or bent keeper plate can allow a spring to become dislodged, causing valve float, spring breakage, or complete loss of function. The plate must be replaced at every overhaul of the associated component.

For hydraulic control valves, the keeper plate holds the return spring under the pilot piston. If the plate is lost or broken, the spool may not return to neutral, causing uncontrolled actuator movement. Always use genuine SANY keeper plates; aftermarket plates often have incorrect hole spacing or inadequate hardness.

Compatible SANY Models & Interchange Information

The keeper plate 169900000120A is used across SANY’s heavy equipment line: SRT45, SRT55, SRT95, SRT115 dump trucks; SY215 to SY500H excavators; SW305, SW405, SW465 wheel loaders; SMG200/220 graders; and STC crawler cranes. It is also fitted on SANY concrete pump trucks and generator sets.

The plate fits M6 or M8 mounting bolts (6.5 mm clearance holes). Hole spacing is 30 mm centre‑to‑centre. Always verify the original plate dimensions. When ordering, specify 169900000120A to receive the correct spring steel, thickness, and hole pattern. Do not substitute with a plain flat washer – the keeper plate is designed to provide spring force and lateral retention.

For fleet maintenance, stock genuine 169900000120A plates. Aftermarket plates often use low‑carbon steel (soft) that bends permanently, losing retention force. Genuine SANY plates are heat‑treated for consistent spring back and corrosion resistance.

Technical Specifications – Keeper Plate 169900000120A

Proper Installation of Keeper Plate 169900000120A

Before installing the keeper plate 169900000120A, clean the mounting surface and the spring/pin that it will retain. Position the plate so that the central slot or notch aligns with the retained component. Insert the mounting bolts (M6 or M8) through the holes and start the nuts. Do not fully tighten yet.

If the plate has a spring finger, ensure it contacts the retained component correctly. Tighten the bolts in a cross pattern to 25 Nm for M8 bolts (or 15 Nm for M6). The plate should compress the spring or pin slightly, but not bottom out. After tightening, verify that the retained component cannot move axially. If movement is present, the plate is incorrectly sized or the spring is damaged.

Do not reuse a keeper plate that has been removed. The mounting holes may be elongated or the spring finger may have taken a permanent set. Always use a new 169900000120A plate. Store plates in a dry environment away from corrosive fumes. Inspect for distortion before installation.

Symptoms of a Damaged Keeper Plate 169900000120A

A failed 169900000120A keeper plate will allow the retained spring or pin to move excessively. You may hear rattling from the valve cover (loose valve spring retainer), or feel a lack of spring force in a hydraulic valve. In extreme cases, a dislodged spring can jam adjacent components, causing sudden machine malfunction. Visible bending, cracking, or missing plate indicates immediate replacement.

If the plate is corroded (red rust), the zinc‑phosphate coating has failed; the plate may be weakened. Replace it. Also, if the mounting holes have become elongated (egg‑shaped), the plate can no longer be secured properly. Aftermarket plates that are too soft will bend permanently under normal load, losing retention force.

During disassembly, always inspect the keeper plate. If it shows any sign of wear or distortion, replace it. Do not attempt to straighten a bent plate – the heat treatment will be lost. Use only genuine SANY plates.

Quality Assurance & Full Traceability for 169900000120A

Every keeper plate 169900000120A is manufactured in an IATF 16949 certified facility. The process includes stamping, heat treating (austenitizing, quenching, tempering), and zinc‑phosphating. In‑process checks monitor hardness, hole dimensions, and flatness using optical comparators.

A sample from each batch is tested for spring force (if a spring finger is present) using a force gauge. Salt spray testing (96 hours) verifies coating integrity. Hardness is checked with a Rockwell tester. A batch code stamped on the plate or packaging provides traceability to the steel coil, heat treat lot, and plating line.

For bulk orders, SANY provides a Certificate of Conformance (CoC) confirming that all 169900000120A plates meet material, dimensional, and hardness specifications. Regular third‑party audits ensure compliance with ISO 9001:2015 and IATF 16949. Use only genuine SANY keeper plates for guaranteed retention reliability.

Field Performance of Genuine SANY Keeper Plate

Field data from SANY equipment operating in Australian mines and North American construction sites shows that genuine 169900000120A keeper plates last the full service life (up to 10,000 hours) without losing retention force. The spring steel resists permanent deformation and fatigue, and the zinc‑phosphate coating prevents rust even in high‑humidity environments.

Aftermarket keeper plates often use unhardened steel that bends after a few cycles, allowing springs to become loose. Genuine SANY plates maintain their shape and spring force, preventing spring dislodgement and component damage. Fleet owners report 80% fewer spring‑related failures after switching to genuine SANY keeper plates.

To maximize service life, always replace the plate when the associated component is serviced. Use a torque wrench to avoid over‑tightening. Store plates in a dry cabinet. Following these practices ensures secure retention and long equipment life.