ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
TEST OR INSPECTION
Connect hydraulic system test set in backhoe control valve-to-manifold block oil line (8 or 9)
between backhoe control valve (3) and manifold block (4). Have assistant start and run engine at
1,250 rpm (TM 5-2420-222-10). While assistant operates backhoe bucket and dipperstick control
lever (5), note reading on hydraulic system test set. Pressure gage reading should be 1700 to 1800
psi (11,645 to 12,411 kPa). Shut down engine (TM 5-2420-222-10) and disconnect hydraulic system
a. If hydraulic system test set pressure gage reads 1700 to 1800 psi (11,645 thru 12,411 kPa),
replace backhoe crowd cylinder (page 2-1740).
b. If hydraulic system test set pressure gage reads less than 1700 psi (11,645 kPa), replace
backhoe control valve (page 2-1260).