HYSTAT PUMP RETURN HOSE FAILURE ON CERTAIN SKID STEER LOADERS AND MULTI TERRAIN LOADERS [TIBU4528]

POWER TRAIN

LINES GP-HYDROSTATIC

HYSTAT PUMP RETURN HOSE FAILURE ON CERTAIN SKID STEER LOADERS AND MULTI TERRAIN LOADERS

CONFIDENTIAL TIBU4528-00

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TECHNICAL INFORMATION BULLETIN	MAY 04, 2005
SKID STEER LOADER MULTI TERRAIN LOADER	216B (RLL1310-UP), 226B (MJH2512-UP), 232B (SCH741-UP), 236B (HEN1631-UP), 242B (BXM1109-UP), 246B (PAT1729-UP), 248B (SCL671-UP), 252B (SCP947-UP), 262B (PDT1306-UP), 268B (LBA689-UP) SKID STEER LOADERS 247B (MTL1108-UP), 257B (SLK1887-UP), 267B (CYC467-UP), 277B (MDH1784-UP), 287B (ZSA1124-UP) MULTI TERRAIN LOADERS
	Component Code: 3154

SUBJECT: HYSTAT PUMP RETURN HOSE FAILURE ON CERTAIN SKID STEER LOADERS AND MULTI TERRAIN LOADERS

PROBLEM:

Failure of the hystat pump return hose may result from excessive pressure in the return circuit due to the restriction of oil flow in the oil cooler lines. A restriction can occur if the oil cooler lines are being kinked or compressed against the firewall when the cooling package is shut.

SOLUTION:

Check to ensure that the oil cooler lines are not kinked or compressed against the firewall when the cooling package is shut. Reposition the oil cooler lines so that the cooler lines are not being kinked or compressed when the cooling package is shut. See Figure 1.

Inspect the hystat pump return hose. If needed, replace the hose with the hose that is specified in Table 1 for your machine. See Figure 2.

Figure 1. Right side view showing oil cooler lines with the cooling package shut.

Figure 2. View from rear of the machine showing the hystat pump return line

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TABLE 1
MACHINE MODEL NUMBER	FORMED HOSE PART NUMBER
216B, 226B	218-6093
232B, 242B	218-6507
236B, 246B, 252B, 262B, 248B, 268B	218-5757
247B	218-6679
257B	218-6527
267B, 277B	218-6102
287B	218-5677