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Recommended Fluids and Lubricants
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USAGE
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FLUIDS/LUBRICANTS
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Engine Oil
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Quality recommended CJ4 (API designation). To determine the viscosity required W-40 for the vehicle’s diesel engine.
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Manual Transmission Oil
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SAE 5W30 SF or Greater
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Automatic Transmission Fluid
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Genuine ISUZU SCS Transmission Fluid. (Do NOT use DEXRON®-III)
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Power Steering Fluid / Hydraulic Brake Booster (HBB) Fluid(NQR, NRR)
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ATF DEXRON®-III
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Rear Axle
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Multi-purpose gear oil SAE90 GL-5
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Rear Axle (Limited Slip Differential)
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Multi-purpose gear oil SAE90 GL-5 for limited slip differential together with 0.6L (1.27 pints/20oz.) limited slip differential lubricant additive (Part No. 8-01052-358-0) or equivalent.
IMPORTANT: Part No. 8-01052-358-0 comes in an 4oz. bottle, therefore you will need to order FIVE (5) bottles.
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Chassis Lubricant
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Multi-purpose grease with high temperature, good quality, lithium soap, extreme pressure grease
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Battery Terminals
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Petroleum Jelly (outer surfaces)
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Clutch and Brake Fluid
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Brake fluid DOT 3 or equivalent
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Cab-Door Hinges and Latches Lubricant
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A semi-fluid grease having extreme pressure properties and containing zinc oxide (Lubricant or equivalent)
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Engine Coolant
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Mixture of water and good quality ethylene glycol base type anti-freeze conforming to GM Spec., 6277M or ISUZU Factory Fill Long Life Coolant Part No.2-90531-809-0
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Windshield Washer Solvent
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Washer Solvent
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Propeller Shaft, Universal
Joints and Sliding Sleeve
Lubricant
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NLGI #1 or #2 multi-purpose type grease
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Propeller Shaft Center Bearing,
Wheel Hub Bearing Lubricant
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NLGI #2 or #3
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Diesel Exhaust Fluid (DEF)
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American Petroleum Institute (API) certified diesel exhaust fluid (DEF) Internation Organization for Standardization (ISO): AUS 32 ISO 2241
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When to Add Engine Oil
If the oil is below the lower hole at the tip of the dipstick, you need to add at least one quart/liter of oil. But you must use the right kind.
Notice: Do not add too much oil. If the engine has so much oil that the oil level gets above the "Full" level that shows the proper operating range, the engine could be damaged.
Be sure to add enough oil to put the level somewhere in the proper operating range. Push the dipstick all the way back in when you are through.
What Kind of Engine Oil to Use
Oils designated as API CJ-4 recommended for the vehicle. The CJ-4 designations can appear either alone, together, or in combination with other American Petroleum Institute (API) designations, such as API CJ-4. These letters show API levels of quality.
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NPR-HD (4HK1 Engine), NQR, NRR Models
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Specifications
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Fluid capacities are approximate values
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Engine Crankcase
This capacity is for the engine lubricating oil. Keep the level as close as possible to the full mark without overfilling. Do not operate with the level below the low mark.
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4HK1
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11.0 L (11.6 qts) – Engine Oil and Filter
9.5 L (10.0 qts) – Engine Oil Only
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The engine oil filter used in this capacity rating is based upon an ISUZU OEM oil filter, which should be changed at each oil change.
Engine Cooling System
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Capacity
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19.6 L (5.2 gal)
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Thermostat
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82, 85°C (180, 185°F)
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Radiator Pressure Cap
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108 kPa (15.66 psi)
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Fuel Tank
The fuel tank capacity is stated on a metal plate attached to the fuel tank body. Only fill the tank to 95 percent of its capacity. This allows room for expansion of the fuel
Manual Transmission
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Capacity
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4.4 L (9.3 pints)
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Automatic Transmission
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Capacity
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13.1 L (27.7 pints)
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Rear Axle
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Differential Gear Oil Capacity
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10.0 L (21.1 pints)
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Limited Slip Differential Lubricant Additive
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0.6 L (1.27 pints)*
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*Only for vehicles equipped with optional limited slip differential
Maintenance Item
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Air Cleaner Filter
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ISUZU Part No. 8-97062-294-0
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Engine Oil Filter Cartridge
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ISUZU Part No. 8-97148-270-1
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Fuel Filter Cartridge
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ISUZU Part No. 8-98147-525-0 (Engine side)
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ISUZU Part No. 8-98147-570-0 (Chassis side)
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Fastener Torques
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Intake Manifold Nut and Bolts
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24 N·m (17 lb ft)
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Exhaust Manifold Nut and Bolts
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34 N·m (25 lb ft)
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Injector
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30 N·m (22 lb ft)
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Steering Gear Box Fixing Nuts and Bolts
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103 N·m (76 lb ft)
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Propeller Shaft Flange Nuts
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103 N·m (76 lb ft)
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Leaf Spring U-Bolt Nuts
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Model
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Front
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Rear
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NPR-HD
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127 N·m(94 lb ft)
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177 N·m(131 lb ft)
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NQRNRR
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196 N·m(145 lb ft)
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284 N·m(209 lb ft)
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Wheel Nuts
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490 N·m (362 lb ft)
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NPR, NPR-HD (4JJ1 Engine) Models
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Specifications
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Fluid capacities are approximate values
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Engine Crankcase
This capacity is for the engine lubricating oil. Keep the level as close as possible to the full mark without overfilling. Do not operate with the level below the low mark.
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4JJ1
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9.2 L (9.7 qts) – Engine Oil and Filter
8.2 L (8.7 qts) – Engine Oil Only
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The engine oil filter used in this capacity rating is based upon an ISUZU OEM oil filter, which should be changed at each oil change.
Engine Cooling System
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Capacity
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12.6 L (3.3 gal)
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Thermostat
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85°C (185°F)
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Radiator Pressure Cap
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108 kPa (15.66 psi)
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Fuel Tank
The fuel tank capacity is stated on a metal plate attached to the fuel tank body. Only fill the tank to 95 percent of its capacity. This allows room for expansion of the fuel
Automatic Transmission
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Capacity
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13.4 L (28.3 pints)
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Rear Axle
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Differential Gear Oil Capacity
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9.0 L (19.0 pints)
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Limited Slip Differential Lubricant Additive
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0.5 L (1.06 pints)*
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*Only for vehicles equipped with optional limited slip differential
Maintenance Item
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Air Cleaner Filter
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ISUZU Part No. 8-9706-2294-0
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Engine Oil Filter Cartridge
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ISUZU Part No. 8-9807-4745-3
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Fuel Filter Cartridge
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ISUZU Part No. 8-9812-4107-0 (Engine side)
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ISUZU Part No. 8-9815-9894-0 (Chassis side)
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Fastener Torques
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Intake Manifold Nut and Bolts
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24 N·m (17 lb ft)
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Exhaust Manifold Nut and Bolts
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34 N·m (25 lb ft)
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Injector
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30 N·m (22 lb ft)
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Steering Gear Box Fixing Nuts and Bolts
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103 N·m (76 lb ft)
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Propeller Shaft Flange Nuts
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103 N·m (76 lb ft)
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Leaf Spring U-Bolt Nuts
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Model
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Front
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Rear
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NPR
NPR-HD
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127 N·m
(94 lb ft)
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177 N·m
(131 lb ft)
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Wheel Nuts
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500 N·m (362 lb ft)
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