Controls - 34 HT220 Operator’s Manual Center Console CMW Item Description Notes 2. Hydraulic fluid temperature gauge Displays hydraulic fluid temperature. Do not exceed 190° F (88° C). Stop engine and wait until cool. 3. Left track pressure gauge Displays hydraulic fluid pressure at the left track. If pressure exceeds 5,000 PSI (344 bar), stop engine and have unit repaired. 4. Right track pressure gauge Displays hydraulic fluid pressure at the right track. If pressure exceeds 5,000 PSI (344 bar), stop engine and have unit repaired. 5. Fuel gauge Displays fuel level in tank. Use only #2 diesel fuel. Fuel tank holds 114 gal (431 L).