Cub Cadet TANK S Series: Hydraulic Drive & Steering System - Manual (Page 5)

TROUBLE SHOOTING CHECKLIST
Possible Cause Corrective Action
UNIT DOES NOT DRIVE/TRACK STRAIGHT
Tires improperly inflated ………………………………………. Refer to units’ manufacturer suggested pressure.
Control linkage bent, loose or out of adjustment …………… Repair, adjust or replace drive linkage.
Bypass loose …………………………………………………… Tighten pump bypass valve.
Inlet Leak ……………………………………………………….. Check all external lines and connections to pump inlet.
DRIVE SYSTEM IS NOISY
Excessive input speed ………………………………………… Adjust input speed above 1800 rpm and below 3600 rpm.
Oil level low or contaminated oil ……………………………… Fill reservoir to proper level or change oil.
Excessive loading ……………………………………………… Reduce vehicle load.
Air trapped in hydraulic system ………………………………. Purge hydraulic system per Purging Procedures.
Bypass loose …………………………………………………... Tighten pump bypass valve.
Inlet leak, line or filter partially blocked or damaged………. Check all external lines and connections and the reservoir
filter to the pump inlet.
UNIT HAS NO / LOW POWER
Engine speed low ……………………………………………… Adjust to correct rpm setting.
Control linkage bent, loose or out of adjustment …………... Repair, replace or adjust vehicle linkage.
Drive belt slipping or pulley damaged ………………………. .Repair or replace drive belt or pulley.
Oil level low or contaminated oil ……………………………... Fill reservoir to proper level or change oil.
Excessive loading …………………………………………….. .Reduce vehicle load.
Bypass loose …………………………………………………… Tighten pump bypass valve.
Air trapped in hydraulic system ………………………………. Purge hydraulic system.
Inlet leak ………………………………………………………… Check all external lines and connections to pump inlet.
Inlet filter clogged ……………………………………………… Replace inlet filter.
Suspected internal damage ………………………………….. Check pump by performing Flow Test.
HYDRAULIC SYSTEM OPERATING HOT
Debris buildup …………………………………………………. Remove debris from pump, fan and radiator.
Cooling fan not working or heat exchanger damaged …….. Repair or replace cooling fan or heat exchanger.
Oil level low or contaminated oil ……………………………... Fill reservoir to proper level or change oil.
(Check for Leaks)
Excessive loading ……………………………………………… Reduce vehicle load.
Air trapped in hydraulic system ………………………………. Purge hydraulic system.
Inlet leak ……………………………………………………….. Check all external lines and connections to pump inlet.
PUMP / SYSTEM LEAKS OIL
Damaged pump seals or gaskets ……………………………… Replace seals.
Loose Fittings…………………………………………………… Tighten as required. Check “O” rings at fittings.
Cracked or broken fittings or component housings………… Check fittings and components. Cracked pump housings
indicate pump internal damage.
Damaged “O” rings, fittings & hoses…………………………. Check all external lines and connections; replace seals
and “O” rings as required.
STEERING UNRESPONSIVE OR JERKY
Air in System …………………………………………………… Purge System.
Leak at fittings or hoses ………………………………………. Check for leaks.
Hoses not installed correctly at the steering cylinder………. Check installation and routing diagram.
Hoses kinked, pinched causing flow restriction. ……………. Check all hoses and lines.
Faulty or damaged pump ……………………………………… Check pump by performing Flow Test.
Faulty or d
amaged cylinder …………………………………… Check cylinder operation.
Jms/CTP Page 5 of 11 1/10/2012