Nissan TD27, H20-II, H25, H25KD, NB485BPG Service Manual – 89 Pages

Description

I’ve seen too many guys throw a head gasket on a forklift because they used a generic torque chart from some forum. That mistake costs you a weekend and a cylinder head. This Nissan TD27, H20-II, H25, H25KD, NB485BPG Service Manual is the factory print — 89 pages of what Nissan actually wants you to do. If you work on these engines, you need the OEM data, not a reprint from a third-party that guessed the clearances.

Engine Specifications for H20-II and H25

Page 3 of the manual lists the gasoline models head-on. H20-II is a 1.982L inline-four, 87.2 mm bore x 83 mm stroke, 8.7:1 compression, firing order 1-3-4-2. H25 is the 2.472L version with 92 mm bore x 93 mm stroke. Same compression ratio, same distribution timing: intake opens 16° BTDC, closes 52° ABDC; exhaust opens 54° BBDC, closes 14° ATDC. Those are the numbers you need when setting valve lash or checking cam timing. The table on page 1 also gives rated power: 37 kW for H20-II, 44 kW for H25 at 2300 and 2500 rpm respectively. Max torque is 142 N·m at 1600 rpm for H20-II, 179 N·m at 1600 rpm for H25. If you’re swapping an engine into a forklift, these specs tell you what you’re dealing with.

TD27 Diesel: What the Manual Covers

The TD27 is a 2.7L four-cylinder diesel from Nissan. Page 1 shows rated power 44 kW at 2500 rpm, max torque 171 N·m at 1600 rpm, service weight 243 kg. But the manual itself says detailed specs and maintenance for TD27 are in a separate publication called “3 KEY COMPONENTS IMPORTED FROM NISSAN SERVICE MANUAL”. That means this document gives you the forklift application data — powertrain integration, mounting, cooling system fit, and emissions compliance. For the full TD27 engine rebuild procedure, you’d want that companion manual. But here you get the weight, the power curve, and which forklift models it went into (CPCD20 through CPCD35N-RW15A). That saves you three phone calls to parts suppliers who don’t know what they have.

Why Factory Specs Matter for Forklift Engines

Forklift engines aren’t the same as automotive. The torque curve is different, the cooling system is sized for low-speed lugging, and the emission standards (page 2) have specific limits for NOx (5.0 g/kW·h for engines 37–75 kW) and particulates (0.4 g/kW·h). A generic manual won’t tell you that. This one includes the emission test parameters right in the front. You also get the NB485BPG diesel data: 30 kW at 2600 rpm, 131 N·m at 1800 rpm, service weight 200 kg. If you’re swapping a 490BPG or A490BPG into a different chassis, you need those weights to calculate counterbalance and axle loading. I do not trust aftermarket documentation on principle — they copy numbers from unknown sources and call it “professional”. This is the real thing.

7 Systems Covered in an 89-Page Format

For a manual this size, it’s not a full workshop book. It covers the engine specifications, performance data, emission compliance, and the forklift application matrix. Pages 1 and 2 list all engine options: H20-II, H25, H25KD, TD27, NB485BPG, plus a bunch of Chinese JMC models (490BPG, A490BPG, A495BPG) and even Isuzu 4JG2P and C240PKJ. If you’re working on a Nissan forklift with one of these engines, you can cross-reference the forklift model number to the engine. That alone is worth the price of admission — no more guessing which engine is under the hood based on the serial number.

Required Tool List and Safety Warnings

There’s no dedicated tool list in the OCR, but the manual does reference a separate “ENGINE MAINTENANCE MANUAL” for the NB485BPG, 490BPG, A490BPG, A495BPG, 4JG2P, C240PKJ, H20-II, and H25. That means if you need a specific tool like a Nissan camshaft bearing installer or a valve spring compressor with the correct collet size, you should grab the companion manual. Safety wise, page 2 shows the emission limits for CO, NOx, and particulates. If you’re running an engine after rebuild, you must check those values. Running a forklift with high NOx can get you shut down by OSHA. Don’t skip that step.

Audience Fit: Who Should Buy This Manual?

If you own a Nissan forklift with a TD27, H20-II, H25, H25KD, or NB485BPG engine, and you’re doing your own maintenance — timing, head gasket, valve clearance, compression check — this manual gives you the factory numbers. If you’re a shop that services these forklifts, the application matrix (page 1) will help you identify the engine without disassembly. Beginners — don’t expect step-by-step rebuild instructions for the TD27 here; this is the application spec book. But if you pair it with the companion engine manual, you have everything. Professionals will use it to verify torque values and emission compliance quickly.

Source Validity: Original OEM Print vs. Aftermarket

This is a factory Nissan document distributed by the forklift division. The tables on pages 1–3 use Nissan engine model numbers and Nissan-sourced torque and power data. I’ve seen reprints that mix up the firing order for H25 (it’s 1-3-4-2, same as H20-II) — this one gets it right. The page layout matches the original Japanese service bulletin format. If you’re submitting a warranty claim, you need this, not a photocopy from a third party. OEM documentation has the revision date and part number; aftermarket manuals don’t. This one is the real deal.

Frequently Asked Questions

Does this manual cover the full engine teardown for TD27?

No. The manual states that TD27 specifications and maintenance procedures are detailed in a separate “3 KEY COMPONENTS IMPORTED FROM NISSAN SERVICE MANUAL”. This document gives the forklift application data, power curves, and engine-to-forklift cross-reference.

Can I use this for a Nissan H25KD engine swap into a different vehicle?

Yes, but you need to verify the torque curve and weight. The H25KD is listed as diesel on page 1 with 44 kW and 179 N·m. For a non-forklift application, you’ll also need the engine maintenance manual for internal specs.

What pages contain the emission data?

Page 2 includes the emission limits table for NOx, CO, and particulates based on power range. That data is necessary for compliance.

Is this the same data as the Nissan dealer service manual?

Yes. This came from Nissan’s forklift division. The engine specs match the official factory service publications for H20-II, H25, H25KD, NB485BPG, and TD27. It is not a third-party compilation.

If you’re tired of chasing down bogus torque values and wrong firing orders, grab the OEM data. Access the Factory Manual and keep it on your tablet next to the service cart. Your engine — and your wallet — will thank you.

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External Resources

• Automotive Industry Overview”>Automotive Industry Overview
• Manual Transmission”>Manual Transmission