312F and 313F Excavator Machine Systems Cylinder Drift - Check

Cylinder Drift - Check - Loaded Bucket

312F and 313F Excavator Machine Systems [M0065826]

312F and 313F Excavator Machine Systems Swing Speed and Swing Drift on a Slope - Check

312F and 313F Excavator Machine Systems Cylinder Speed - Check

HYDRAULIC SYSTEM

CYLINDER GP

312F and 313F Excavator Machine Systems Cylinder Drift - Check - Empty Bucket

312F and 313F Excavator Machine Systems Cylinder Drift - Check - Loaded Bucket

312F and 313F Excavator Machine Systems Cylinder Speed - Check

312F and 313F Excavator Machine Systems Cylinder Drift - Check - Blade (If Equipped)

312F and 313F Excavator Machine Systems Cylinder Speed - Check - Blade (If Equipped)

1.1. Specification

2.1. Introduction

3.1. Required Tools

4.1. Test Procedure

Specification

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Table 1
"Cylinder Drift - Check (Loaded Bucket)"
Item	New	Service Limit	Actual
Boom Cylinder	4.5 mm (0.17 inch) or less	11.0 mm (0.43 inch) or less
Stick Cylinder	12.0 mm (0.47 inch) or less	30.0 mm (1.18 inch) or less
Bucket Cylinder	18.0 mm (0.71 inch) or less	45.0 mm (1.77 inch) or less

Introduction

The performance level of the cylinder, the cylinder seals, and the overload relief valves for the implements can be determined with the following procedure.

Note: The machine configuration that is used during this test can affect the results of this test. Refer to Testing and Adjusting, "Operational Checks" for the machine configurations that were used for this test.

Note: The relief valve pressure settings must be set to the relief valve pressure specification before performing this operational check. Refer to Testing and Adjusting, "Specifications".

Required Tools

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Table 2
Description	Qty
Measuring Tape	1
Stopwatch	1

Test Procedure

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Illustration 1	g00298378

Position the machine on level ground. Refer to Illustration 1.
Load the bucket.
Weight of bucket load
312F/313F 936 kg (2063.5 lb)
Raise the boom until the stick to bucket pin is the same height as the boom foot pin.
Fully extend the bucket cylinder.
Fully retract the stick cylinder.
Extend the stick cylinder rod 70 mm (2.8 inch) from the fully retracted position.
Measure each cylinder length from cylinder pin to cylinder pin.
Stop the engine.
Leave the machine in this position for 3 minutes. Measure each cylinder length from cylinder pin to cylinder pin for drift.