Description
7C-1511: 34.14mm Outer Diameter Plunger Ring
| 7C-1511: 34.14mm Outer Diameter Plunger Ring |
| 7W-2731: Indicator Retainer |
| 219-1241: 30mm Inside Diameter Single Row Ball Bearing |
| 3G-0910: 101.75mm Minimum ID Steel Bearing Cap |
| 7J-4983: Two Bolt Bearing Cap |
| 177-4143: Bearing – Cone(Debris Resistant) |
| 3T-5923: 122mm Outer Diameter Steel Round Retainer |
| 9J-1433: Four Mounting Holes 35mm Steel Bearing Cap |
The Cat 7C-1511 is a dedicated plunger ring for Caterpillar engine oil pumps. Its core function is sealing the oil pump plunger against the pump body/cover. It is compatible with various heavy-duty engine oil pump assemblies, ensuring the sealing and pressure stability of the high-pressure oil supply system. Key information is as follows:
Core Parameters
Item Details
Type
Oil pump plunger sealing ring (rectangular cross-section compression ring), used for radial sealing during plunger reciprocating motion, preventing oil leakage between the high-pressure and low-pressure chambers of the oil pump, suitable for the sealing requirements of high-pressure oil pump plunger assemblies.
Compatible Models
Cat C7, C9, C13, C15 engines, compatible with oil pump assemblies of Cat 320D/323D excavators, 966K loaders, 777 mining trucks, etc., used for sealing assembly during oil pump overhauls and plunger assembly replacement.
Material and Process
Material: Ductile iron (QT500-7), surface treated with gas nitriding, hardness… HV800-1000, wear-resistant and oil-resistant; surface: matte silver-gray, nitrided layer thickness 0.15-0.20mm; cut: straight cut, precise cut gap control to accommodate thermal expansion and contraction.
Key Dimensions: Inner diameter 38mm (1.496 inches), outer diameter 42mm (1.654 inches), thickness 2.5mm (0.098 inches), cut gap 0.10-0.15mm (room temperature), weight approx. 0.012kg (0.026 lbs).
Installation Requirements: Clean the plunger and ring groove before installation, apply Cat… Specialized cleaning oil and specialized tools are used for installation to prevent ring deformation. After installation, check the ring’s rotational flexibility within the groove to ensure a good seal.
Functions and Suitable Scenarios
Core Function: Provides a stable radial seal during the reciprocating motion of the oil pump plunger, preventing high-pressure oil leakage from the gap between the plunger and pump barrel, maintaining stable oil pump supply pressure and flow, and meeting the sealing requirements under high-speed, high-pressure engine conditions.
Suitable Scenarios: Used for replacing plunger rings when the oil pump experiences insufficient pressure, decreased flow, or leakage, and inspection reveals plunger ring wear, aging, or breakage. Suitable for oil pump sealing system maintenance during minor/medium engine overhauls.
Performance Characteristics
The ductile iron material, combined with gas nitriding treatment, offers both high wear resistance and good elasticity, adapting to high-speed reciprocating plunger motion and extending service life.
Precise dimensional and slit clearance control ensures sealing performance at different temperatures, reducing leakage risk and guaranteeing stable oil pump supply.
The straight cut design makes installation convenient and is compatible with the plunger ring groove structure, facilitating quick replacement and reducing maintenance time.
