Lubrication (H4SO): General Description: Specifications

LUBRICATION SPECIFICATION

Lubrication method				Forced lubrication
Oil pump	Pump type			Trochoid type
	Number of teeth		Inner rotor	9
	Number of teeth		Outer rotor	10
	Outer rotor diameter x thickness			78 x 7 mm (3.07 x 0.28 in)
	Tip clearance between inner and outer rotor		STANDARD	0.04 - 0.14 mm (0.0016 - 0.0055 in)
	Tip clearance between inner and outer rotor		LIMIT	0.18 mm (0.0071 in)
	Side clearance between inner rotor and pump case		STANDARD	0.02 - 0.07 mm (0.0008 - 0.0028 in)
	Side clearance between inner rotor and pump case		LIMIT	0.12 mm (0.0047 in)
	Case clearance between outer rotor and pump case		STANDARD	0.10 - 0.175 mm (0.0039 - 0.0069 in)
	Case clearance between outer rotor and pump case		LIMIT	0.20 mm (0.0079 in)
	Capacity at 80°C (176°F)	600 rpm	Discharge pressure	98 kPa (1.0 kg/cm² , 14 psi)
		600 rpm	Discharge quantity	3.2 l (3.4 US qt, 2.8 Imp qt)/min.
		5,000 rpm	Discharge pressure	294 kPa (3.0 kg/cm² , 43 psi)
		5,000 rpm	Discharge quantity	32.6 l (34.5 US qt, 28.7 Imp qt)/min.
	Relief valve operation pressure			490 kPa (5.0 kg/cm² , 71 psi)
Oil filter	Type			Type of full-flow with 3 papers
	Filtration area			910 cm² (141 sq in)
	By-pass valve opening pressure			157 kPa (1.6 kg/cm² , 23 psi)
	Outer diameter x width			80 x 75 mm (3.15 x 2.95 in)
	Installation screw type			M 20 x 1.5
Oil pressure switch	Type			Type of contact point in oil
	Working voltage - wattage			12 V - 3.4 W or less
	Warning light activation pressure			14.7 kPa (0.15 kg/cm² , 2.1 psi)
	Proof pressure			More than 981 kPa (10 kg/cm² , 142 psi)
Oil capacity (when replacing oil)				Approx. 4.0 l (4.2 US qt, 3.5 Imp qt)

Recommended oil:

API classification SL with the words "Energy Conserving" (if the oil with SL grade cannot be obtained, it is okay to use SJ grade oil).

ILSAC GF-3 or the equivalent which is indicated on the container with the new API certification mark (Star burst mark).

NOTE: If vehicle is used in desert areas with very high temperatures or for other heavy duty applications, the following viscosity oils may be used: ILSAC classification: GF-3 or API classification: SL
SAE Viscosity No.: 30, 40, 10W-50, 20W-40, 20W-50.

Fig 1: SAE Viscosity No. And Temperature Chart

Courtesy of SUBARU OF AMERICA, INC.

SAE Viscosity No. and Applicable Temperature
PREFERRED