5. LUBRICATION SYSTEM 5.5 Parts Inspection and Measurement 5.5.1 Trochoid pump inspection and measurement (1) Outside clearance of outer rotor Insert a gap gauge between a outer rotor and a pump body, and measure the clearance. Outside clearance mm (2) Side clearance of outer rotor When measuring a side clearance, put a right- angle gauge to the pump body, insert a gap gauge and measure the clearance.
Side clearance mm (3) Inner rotor and gear boss clearance (3D82AE – 4D88E) 5-4 82E-5 – 98E-5 SERIES Model Standard Limit 3D82AE – 4D88E 0.12 – 0.21 0.30 4D94LE, (S)4D98E 0.100 – 0.155 0.25 Model Standard Limit 3D82AE – 4D88E 0.02 – 0.07 0.12 4D94LE, (S)4D98E 0.05 – 0.10 0.15 Item Part Standard dimension (mm) Standard clearance (mm) Standard clearance limit (mm) Inside clearance of inner rotor Gear boss diameter 53.05 – 53.15 0.3 – 0.5 0.6 Rotor inner diameter 53.45 – 53.55 Width across flat clear- ance of inner rotor Width across flat of gear boss 49.45 – 49.75 0.2 – 0.6 0.7 Width across flat of rotor 49.95 – 50.05