CAGE 5J6423 - Caterpillar

Introduction
The pilot pump is a gear pump that supplies oil flow to the pilot system. The pilot pump is located inside the main pump compartment and mounted externally to the main pump. This test is used to measure pump flow at the pilot pump.Required Tools
Illustration 1 g02535237
Tooling (C)
Illustration 2 g02156033
Tooling group (D)
Table 5
Tool Item Qty Part
Number Description
C 1 348-5430 Multi-Tool Gp
C1 1 285-0908 Multi-Tool
C2 1 6V-2198 Cable As
C3 1 9U-5140 Photo Pickup
C4 1 6V-3137 Base
C5 1 1U-6605 Reflective Tape
C6 1 6V-3138 Extension
D D1 1 6V-7788 Flow Meter
5 to 60 L/min (2 to 15 US gpm)
D2 1 8C-6874 Reducer
D3 1 6V-9746 O-Ring Seal
D4 1 124-1901 Permanent Coupling
D5 3 ft 122-6870 Bulk Hydraulic Hose
D6 1 124-2147 Permanent Coupling
D7 1 6V-8942 O-Ring Reducer
D8 1 6V-8556 Nut
D9 1 6V-8398 O-Ring Seal
F 1 311-1362 Vacuum Cap Reference: Refer to Tool Operating Manual, NEHS1087 for operating instructions for the 348-5430 Multi-Tool Gp.Note: Use Software License Card, NETG5049 with part number 348-5430 Multi-Tool Gp.Machine Preparation
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.Dispose of all fluids according to local regulations and mandates.
Note: Set the pilot relief valve to the specification. Refer to Testing and Adjusting, "Relief Valve (Pilot) - Test and Adjust".
Position the machine on level ground.
Stop the engine.
Release the pressure in the hydraulic system. Refer to Testing and Adjusting, "System Pressure - Release".
Attach 311-1362 Vacuum Cap onto the hydraulic tank. Attach an air supply hose onto the assembly. Apply 276 to 414 kPa (40 to 60 psi). This procedure will pull a vacuum on the hydraulic system.
Illustration 3 g03348644
Flow meter tool layout
Tooling (D)
( 1) Pilot pump
(2) Connector
(3) Hose
(4) Pilot filter
Install the following tools in accordance with the flow meter tool layout. Refer to Illustration 3.
Disconnect hose (3) from connector (2).
Connect flow meter assembly (D) between connector (2) and hose (3).Note: Correct orientation of the flow meter is necessary. The oil flows from pilot pump (1) to pilot filter (4).
Remove 311-1362 Vacuum Cap.
Install tooling (C) on the engine to monitor engine speed.Test Procedure
Start the engine.
Increase the hydraulic oil temperature to 55° 5°C (131° 9°F).
Place the machine controls at the following settings: engine speed dial "10" and AEC switch OFF. Refer to Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for engine rpm settings.
Check the flow of oil through the flow meter. Refer to Table 3 for HP mode. Refer to Table 3 for STD mode.